{"id":6198,"date":"2023-02-20T19:14:37","date_gmt":"2023-02-20T13:44:37","guid":{"rendered":"https:\/\/ccssanswers.com\/?p=6198"},"modified":"2023-02-21T17:31:40","modified_gmt":"2023-02-21T12:01:40","slug":"go-math-grade-7-answer-key-chapter-10-random-samples-and-populations","status":"publish","type":"post","link":"https:\/\/ccssanswers.com\/go-math-grade-7-answer-key-chapter-10-random-samples-and-populations\/","title":{"rendered":"Go Math Grade 7 Answer Key Chapter 10 Random Samples and Populations"},"content":{"rendered":"<p>Get free step by step explanations for all the questions in Go Math Grade 7 Answer Key Chapter 10 Random Samples and Populations. Make use of the links and start preparing for the exams through <a href=\"https:\/\/ccssanswers.com\/go-math-grade-7-answer-key\/\" target=\"_blank\" rel=\"noopener noreferrer\">Go Math Grade 7 Answer Key<\/a> for Chapter 10 Random Samples and Populations. It is very essential for the students to understand the concepts in Chapter 10 Random Samples and Populations.<\/p>\n<h2>Go Math Grade 7 Answer Key Chapter 10 Random Samples and Populations<\/h2>\n<p>Go Math Grade 7 Solution Key Chapter 10 Random Samples and Populations is the best study material to score the highest marks in the examinations. The HMH Go Math 7th Grade Answer Key Chapter 10 Random Samples &amp; Populations helps the students to understand the concepts without any difficulty. Click on the below links for the Go Math Grade 7 solutions which are given with a brief explanation.<\/p>\n<p><strong>Chapter 10 Random Samples and Populations &#8211; Lesson 1<\/strong><\/p>\n<ul>\n<li><a href=\"#Guided_Practice_Page_No_314\">Guided Practice &#8211; Page No. 314<\/a><\/li>\n<li><a href=\"#Independent_Practice_Page_No_315\">Independent Practice &#8211; Page No. 315<\/a><\/li>\n<li><a href=\"#H_O_T_Page_No_316\">H.O.T. &#8211; Page No. 316<\/a><\/li>\n<\/ul>\n<p><strong>Chapter 10 Random Samples and Populations &#8211; Lesson: 2<\/strong><\/p>\n<ul>\n<li><a href=\"#Guided_Practice_Page_No_320\">Guided Practice &#8211; Page No. 320<\/a><\/li>\n<li><a href=\"#Independent_Practice_Page_No_321\">Independent Practice &#8211; Page No. 321<\/a><\/li>\n<li><a href=\"#Page_No_322\">Page No. 322<\/a><\/li>\n<\/ul>\n<p><strong>Chapter 10 &#8211; Random Samples and Populations\u00a0<\/strong><\/p>\n<ul>\n<li><a href=\"#Page_No_326\">Page No. 326<\/a><\/li>\n<li><a href=\"#Page_No_327\">Page No. 327<\/a><\/li>\n<li><a href=\"#Page_No_328\">Page No. 328<\/a><\/li>\n<li><a href=\"#10_1_Populations_and_Samples_Page_No_329\">10.1 Populations and Samples &#8211; Page No. 329<\/a><\/li>\n<li><a href=\"#Selected_Response_Page_No_330\">Selected Response &#8211; Page No. 330<\/a><\/li>\n<\/ul>\n<h3><a id=\"Guided_Practice_Page_No_314\"><\/a> Guided Practice &#8211; Page No. 314<\/h3>\n<p>Question 1.<br \/>\nFollow each method described below to collect data to estimate the average shoe size of seventh grade boys.<br \/>\n<img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2020\/08\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-img-1.jpg\" alt=\"Go Math Grade 7 Answer Key Chapter 10 Random Samples and Populations img 1\" width=\"314\" height=\"191\" \/><\/p>\n<p>Answer:<br \/>\nMethod 1:<br \/>\nSelect randomly 5 seventh grade boys and record their shoe size in a table.<\/p>\n<p>Answer:<br \/>\n<img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-7427\" src=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2020\/08\/1-226x300.png\" alt=\"Go Math Grade 7 Answer Key Chapter 10 Random Samples and Populations\" width=\"226\" height=\"300\" srcset=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2020\/08\/1-226x300.png 226w, https:\/\/ccssanswers.com\/wp-content\/uploads\/2020\/08\/1.png 262w\" sizes=\"(max-width: 226px) 100vw, 226px\" \/><\/p>\n<p>The mean is \\(\\frac{10+8+7.5+9+10}{5}<br \/>\n= \\frac{44.5}{5}\\)<br \/>\n= 8.9<\/p>\n<p>Method 2:<br \/>\nFind the 5 boys in the class who has largest shoe size and record in a table.<\/p>\n<p>Answer:<br \/>\n<img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-7428\" src=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2020\/08\/2-1-235x300.png\" alt=\"Go Math Grade 7 Answer Key Chapter 10 Random Samples and Populations\" width=\"235\" height=\"300\" srcset=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2020\/08\/2-1-235x300.png 235w, https:\/\/ccssanswers.com\/wp-content\/uploads\/2020\/08\/2-1.png 274w\" sizes=\"(max-width: 235px) 100vw, 235px\" \/><\/p>\n<p>Question 2.<br \/>\nMethod 1 produces results that are more\/less representative of the entire student population because it is a random\/biased sample.<\/p>\n<p>Answer: Method 1 produces results that are more representative of the entire student population because it is a random sample.<\/p>\n<p>Question 3.<br \/>\nMethod 2 produces results that are more\/less representative of the entire student population because it is a random\/biased sample.<\/p>\n<p>Answer: Method 2 produces results that are less representative of the entire student population because it is a biased sample.<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-169068\" src=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-314-Q4.png\" alt=\"Go Math Grade 7 Answer Key Chapter 10 Random Samples and Populations Page 314 Q4\" width=\"667\" height=\"310\" srcset=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-314-Q4.png 667w, https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-314-Q4-300x139.png 300w\" sizes=\"(max-width: 667px) 100vw, 667px\" \/><\/p>\n<p><strong>Essential Question Check-In<\/strong><\/p>\n<p>Question 5.<br \/>\nHow can you select a sample so that the information gained represents the entire population?<\/p>\n<p>Answer: We should select a sample that is randomly chosen and is sufficiently large enough so that the result so that results are representative of the entire population.<\/p>\n<h3><a id=\"Independent_Practice_Page_No_315\"><\/a> Independent Practice &#8211; Page No. 315<\/h3>\n<p>Question 6.<br \/>\nPaul and his friends average their test grades and find that the average is 95. The teacher announces that the average grade of all of her classes is 83. Why are the averages so different?<\/p>\n<p>Answer: As Paul and his friends are not a randomly chosen sample of the class population, so the averages are different.<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-169069\" src=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-315-Q7.png\" alt=\"Go Math Grade 7 Answer Key Chapter 10 Random Samples and Populations Page 315 Q7\" width=\"657\" height=\"325\" srcset=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-315-Q7.png 657w, https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-315-Q7-300x148.png 300w\" sizes=\"(max-width: 657px) 100vw, 657px\" \/><\/p>\n<p><strong>For 8\u201310, determine whether each sample is a random sample or a biased sample. Explain.<\/strong><\/p>\n<p>Question 8.<br \/>\nCarol wants to find out the favorite foods of students at her middle school. She asks the boys\u2019 basketball team about their favorite foods.<\/p>\n<p>Answer: As Carol asks only boys and girls are not represented in the sample, so the sample is biased.<\/p>\n<p>Question 9.<br \/>\nDallas wants to know what elective subjects the students at his school like best. He surveys students who are leaving band class.<\/p>\n<p>Answer: Dallas asked only students who are in band class and elective subject students are not represented, so the sample is biased.<\/p>\n<p>Question 10.<br \/>\nTo choose a sample for a survey of seventh graders, the student council puts pieces of paper with the names of all the seventh graders in a bag and selects 20 names.<\/p>\n<p>Answer: As all students had an equal chance of being represented in the survey, the sample is random.<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-169070\" src=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-315-Q11.png\" alt=\"Go Math Grade 7 Answer Key Chapter 10 Random Samples and Populations Page 315 Q11\" width=\"660\" height=\"343\" srcset=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-315-Q11.png 660w, https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-315-Q11-300x156.png 300w\" sizes=\"(max-width: 660px) 100vw, 660px\" \/><\/p>\n<p><strong>For 12\u201313, determine whether each question may be biased. Explain.<\/strong><\/p>\n<p>Question 12.<br \/>\nJoey wants to find out what sport seventh-grade girls like most. He asks girls, \u201cIs basketball your favorite sport?\u201d<\/p>\n<p>Answer: As it mentions basketball and suggests that girls should give a certain answer. So the question is biased.<\/p>\n<p>Question 13.<br \/>\nJae wants to find out what type of art her fellow students enjoy most. She asks her classmates, \u201cWhat is your favorite type of art?\u201d<\/p>\n<p>Answer: As it does not suggest students should give a certain answer, it is not biased.<\/p>\n<h3><a id=\"H_O_T_Page_No_316\"><\/a> H.O.T. &#8211; Page No. 316<\/h3>\n<p><strong>Focus on Higher Order Thinking<\/strong><\/p>\n<p>Question 14.<br \/>\nDraw Conclusions<br \/>\nDetermine which sampling method will better represent the entire population. Justify your answer.<br \/>\n<img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2020\/08\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-img-2.jpg\" alt=\"Go Math Grade 7 Answer Key Chapter 10 Random Samples and Populations img 2\" width=\"593\" height=\"174\" \/><\/p>\n<p>Answer: Collin&#8217;s survey is a better sampling method. Collin is randomly choosing names from the school directory, so each student has a chance of being chosen because they all appear in the school directory.<br \/>\nKarl&#8217;s survey is biased, as he is only choosing the students that were sitting near him during lunch which means the people he is asking are not representative of the entire population.<\/p>\n<p>Question 15.<br \/>\nMultistep<br \/>\nBarbara surveyed students in her school by looking at an alphabetical list of 600 student names, dividing them into groups of 10, and randomly choosing one from each group.<br \/>\na. How many students did she survey? What type of sample is this?<br \/>\n__________ people<br \/>\nThis is a __________ sample<\/p>\n<p>Answer: Barbara made 600\u00f710= 60 groups, so she chose one person in each group and surveyed 60 people. So this is a random sample because all the students are being represented and have an equal chance of being chosen.<\/p>\n<p>Question 15.<br \/>\nb. Barbara found that 35 of the survey participants had pets. About what percent of the students she surveyed had pets? Is it safe to believe that about the same percentage of students in the school have pets? Explain your thinking.<br \/>\n__________ %<\/p>\n<p>Answer: As there are 60 survey participants and in that 35\/60= 0.58% \u224858%. Yes, it is safe to believe that about the same percentage of students in the school have pets because the sample is large enough large and all students have represented.<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-169072\" src=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-316-Q16.png\" alt=\"Go Math Grade 7 Answer Key Chapter 10 Random Samples and Populations Page 316 Q16\" width=\"676\" height=\"414\" srcset=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-316-Q16.png 676w, https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-316-Q16-300x184.png 300w\" sizes=\"(max-width: 676px) 100vw, 676px\" \/><\/p>\n<h3><a id=\"Guided_Practice_Page_No_320\"><\/a> Guided Practice &#8211; Page No. 320<\/h3>\n<p><strong>Patrons in the children\u2019s section of a local branch library were randomly selected and asked for their ages. The librarian wants to use the data to infer the ages of all patrons of the children\u2019s section so he can select age-appropriate activities. In 3\u20136, complete each inference.<\/strong><br \/>\n<strong>7, 4, 7, 5, 4, 10, 11, 6, 7, 4<\/strong><\/p>\n<p>Question 1.<br \/>\nMake a dot plot of the sample population data.<\/p>\n<p>Answer:<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-7445\" src=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2020\/08\/3-1-300x89.png\" alt=\"Go Math Grade 7 Answer Key Chapter 10 Random Samples and Populations\" width=\"300\" height=\"89\" srcset=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2020\/08\/3-1-300x89.png 300w, https:\/\/ccssanswers.com\/wp-content\/uploads\/2020\/08\/3-1.png 343w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<p>Question 2.<br \/>\nMake a box plot of the sample population data.<\/p>\n<p>Answer: First we need to find the median, so we need to order the numbers from least to greatest: 4,4,4,5,6,7,7,7,10,11.<br \/>\nSo the median is (6+7)\/2= 13\/2= 6.5.<br \/>\nAnd the median for half of the data is 4,4,4,5,6= 4.<br \/>\nAnd the other half of the data is 7,7,7,10,11= 7.<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone wp-image-7446\" src=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2020\/08\/4-1-300x103.png\" alt=\"Go Math Grade 7 Answer Key Chapter 10 Random Samples and Populations\" width=\"481\" height=\"165\" srcset=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2020\/08\/4-1-300x103.png 300w, https:\/\/ccssanswers.com\/wp-content\/uploads\/2020\/08\/4-1.png 390w\" sizes=\"(max-width: 481px) 100vw, 481px\" \/><\/p>\n<p>Question 3.<br \/>\nThe most common ages of children that use the library are _____ and _____.<br \/>\n_____ and _____<\/p>\n<p>Answer: 4 and 7 are the numbers repeated the most in the data set, so the most common ages of the children that use the library are 4 and 7.<\/p>\n<p>Question 4.<br \/>\nThe range of ages of children that use the library is from _____ to _____.<br \/>\n_____ to _____<\/p>\n<p>Answer: The lower that appears in the data set is 4 and the higher that appears in the data set is 11, so the range of ages of children that use the library is from 4 to 7.<\/p>\n<p>Question 5.<br \/>\nThe median age of children that use the library is _____.<br \/>\n_____<\/p>\n<p>Answer: The median age of children that use the library is 6.5.<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-169073\" src=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-320-Q6.png\" alt=\"Go Math Grade 7 Answer Key Chapter 10 Random Samples and Populations Page 320 Q6\" width=\"680\" height=\"370\" srcset=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-320-Q6.png 680w, https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-320-Q6-300x163.png 300w\" sizes=\"(max-width: 680px) 100vw, 680px\" \/><\/p>\n<p>Question 7.<br \/>\nPart of the population of 4,500 elk at a wildlife preserve is infected with a parasite. A random sample of 50 elk shows that 8 of them are infected. How many elk are likely to be infected?<br \/>\n_____ elk<\/p>\n<p>Answer: If we break down the whole elk population into samples of 50 elk, we get 4500\u00f750= 90 samples. So if we find 8 infected elk in every sample and we can expect about 8\u00d790= 720 elk to be infected.<\/p>\n<p><strong>Essential Question Check-In<\/strong><\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-169074\" src=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-320-Q8.png\" alt=\"Go Math Grade 7 Answer Key Chapter 10 Random Samples and Populations Page 320 Q8\" width=\"652\" height=\"248\" srcset=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-320-Q8.png 652w, https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-320-Q8-300x114.png 300w\" sizes=\"(max-width: 652px) 100vw, 652px\" \/><\/p>\n<h3><a id=\"Independent_Practice_Page_No_321\"><\/a> Independent Practice &#8211; Page No. 321<\/h3>\n<p>Question 9.<br \/>\nA manager samples the receipts of every fifth person who goes through the line. Out of 50 people, 4 had a mispriced item. If 600 people go to this store each day, how many people would you expect to have a mispriced item?<br \/>\n_____ people<\/p>\n<p>Answer: 48 people.<\/p>\n<p>Explanation:<br \/>\nLet X be the number of people with a mispriced item, so<br \/>\n4\/50= X\/600<br \/>\n50X= 2400<br \/>\nX= 48.<br \/>\nSo there will be 48 people with a mispriced item.<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-169075\" src=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-321-Q10.png\" alt=\"Go Math Grade 7 Answer Key Chapter 10 Random Samples and Populations Page 321 Q10\" width=\"660\" height=\"456\" srcset=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-321-Q10.png 660w, https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-321-Q10-300x207.png 300w\" sizes=\"(max-width: 660px) 100vw, 660px\" \/><\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-169076\" src=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-321-Q11.png\" alt=\"Go Math Grade 7 Answer Key Chapter 10 Random Samples and Populations Page 321 Q11\" width=\"656\" height=\"553\" srcset=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-321-Q11.png 656w, https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-321-Q11-300x253.png 300w\" sizes=\"(max-width: 656px) 100vw, 656px\" \/><\/p>\n<p>Question 12.<br \/>\nPart of the population of 10,800 hawks at a national park is building a nest. A random sample of 72 hawks shows that 12 of them are building a nest. Estimate the number of hawks building a nest in the population.<br \/>\n_____ hawks<\/p>\n<p>Answer: 1800 hawks.<\/p>\n<p>Explanation:<br \/>\nLet X be the number of boxes with at least one broken crayon<br \/>\n12\/72= X\/10,800<br \/>\n72X= 10,800<br \/>\nX= 1800.<br \/>\nSo there will be 1800 hawks building a nest in the population.<\/p>\n<p>Question 13.<br \/>\nIn a wildlife preserve, a random sample of the population of 150 raccoons was caught and weighed. The results, given in pounds, were 17, 19, 20, 21, 23, 27, 28, 28, 28, and 32. Jean made the qualitative statement, \u201cThe average weight of the raccoon population is 25 pounds.\u201d Is her statement reasonable? Explain.<br \/>\n_____<\/p>\n<p>Answer: Yes, Jean&#8217;s statement is reasonable.<\/p>\n<p>Explanation: As the weights are not given for all 150 raccoons, so we don&#8217;t know how many raccoons are at each of the weights given, and we cannot calculate the average. So the best way to estimate the average is to find the median of the data set. So the median is<br \/>\n(23+27)\/2= 25. As the median is 25 Jean&#8217;s statement is reasonable.<\/p>\n<p>Question 14.<br \/>\nGreta collects the number of miles run each week from a random sample of female marathon runners. Her data are shown below. She made the qualitative statement, \u201c25% of female marathoners run 13 or more miles a week.\u201d Is her statement reasonable? Explain. Data: 13, 14, 18, 13, 12, 17, 15, 12, 13, 19, 11, 14, 14, 18, 22, 12.<br \/>\n_____<\/p>\n<p>Answer: Greta&#8217;s statement is not reasonable.<\/p>\n<p>Explanation: If we set the data from least to highest then 11,12,12,12,13,13,13,14,14,14,15,17,18,18,19,22. So there are 16 marathon runners, and 12 of them run 13 miles or more each week. So<br \/>\n12\/16= 0.75= 75%. So Greta&#8217;s statement is not reasonable.<\/p>\n<p>Question 15.<br \/>\nA random sample of 20 of the 200 students at Garland Elementary is asked how many siblings each has. The data are ordered as shown. Make a dot plot of the data. Then make a qualitative statement about the population. Data: 0, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 6.<\/p>\n<p>Answer: The mean is 2.<\/p>\n<p>Explanation:<br \/>\nThe mean is \\(\\frac{0+1+1+1+1+1+1+2+2+2+2+2+3+3+3+3+4+4+4+6}{20}<br \/>\n= \\frac{46}{20}\\)<br \/>\n= 2.3<br \/>\nSo the mean is 2 as for the siblings the number must be a whole number.<br \/>\nMost of the students have at least 1 sibling and most of the students have fewer than 6 siblings, and the students have an average of two siblings.<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-7462\" src=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2020\/08\/5-1.png\" alt=\"Go Math Grade 7 Answer Key Chapter 10 Random Samples and Populations\" width=\"266\" height=\"146\" \/><\/p>\n<p>Question 16.<br \/>\nLinda collects a random sample of 12 of the 98 Wilderness Club members\u2019 ages. She makes an inference that most wilderness club members are between 20 and 40 years old. Describe what a box plot that would confirm Linda\u2019s inference should look like.<\/p>\n<p>Answer: Linda will conclude that most of the club members are between the ages of 20 and 40, so more than half of the 12 surveyed members must be between those ages. The box plot would have the lower quartile at 20 and upper quartile at 40.<\/p>\n<h3><a id=\"Page_No_322\"><\/a> Page No. 322<\/h3>\n<p>Question 17.<br \/>\nWhat\u2019s the Error?<br \/>\nKudrey was making a box plot. He first plotted the least and greatest data values. He then divided the distance into half, and then did this again for each half. What did Kudrey do wrong and what did his box plot look like?<\/p>\n<p>Answer: By creating a box plot, the 3 middle values are not found by dividing the distance between the maximum and minimum values and then dividing the distances in half again. The 3 middle values are found by finding the median of the set values, the median of the first half of the values, and the median of the last half of the values.<\/p>\n<p><strong>H.O.T.<\/strong><\/p>\n<p><strong>Focus on Higher Order Thinking<\/strong><\/p>\n<p>Question 18.<br \/>\nCommunicating Mathematical Ideas<br \/>\nA dot plot includes all of the actual data values. Does a box plot include any of the actual data values?<br \/>\n______<\/p>\n<p>Answer: Yes, a dot plot will include all of the actual data values. The only actual data values that a box plot must have the minimum and maximum values. The 3 median values may are may not be actual data values.<\/p>\n<p>Question 19.<br \/>\nMake a Conjecture<br \/>\nSammy counted the peanuts in several packages of roasted peanuts. He found that the bags had 102, 114, 97, 85, 106, 120, 107, and 111 peanuts. Should he make a box plot or dot plot to represent the data? Explain your reasoning.<br \/>\n______<\/p>\n<p>Answer: Sammy should make a box plot to represent the data. As dot plots are helpful in finding the number of times each value occurs in a data set. As the values occur only once, so the box plot will better represent the data.<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-169077\" src=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-322-Q20.png\" alt=\"Go Math Grade 7 Answer Key Chapter 10 Random Samples and Populations Page 322 Q20\" width=\"685\" height=\"549\" srcset=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-322-Q20.png 685w, https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-322-Q20-300x240.png 300w\" sizes=\"(max-width: 685px) 100vw, 685px\" \/><\/p>\n<h3><a id=\"Page_No_326\"><\/a> Page No. 326<\/h3>\n<p><strong>A manufacturer gets a shipment of 600 batteries of which 50 are defective. The store manager wants to be able to test random samples in future shipments. She tests a random sample of 20 batteries in this shipment to see whether a sample of that size produces a reasonable inference about the entire shipment.<\/strong><\/p>\n<p>Question 1.<br \/>\nThe manager selects a random sample using the formula randInt( , ) to generate _____ random numbers.<\/p>\n<p>Answer: Since 50 out of 600 batteries are defective and she is testing 20 batteries she can use randInt(1,600) to generate 20 random numbers.<\/p>\n<p>Question 2.<br \/>\nShe lets numbers from 1 to _____ represent defective batteries, and _____ to _____ represent working batteries. She generates this list: 120, 413, 472, 564, 38, 266, 344, 476, 486, 177, 26, 331, 358, 131, 352, 227, 31, 253, 31, 277.<\/p>\n<p>Answer: She lets numbers from 1 to 50 represent defective batteries and 51 to 600 represent working batteries. She generates this list:<br \/>\n120, 413, 472, 564, 38, 266, 344, 476, 486, 177, 26, 331, 358, 131, 352, 227, 31, 253, 31, 277.<\/p>\n<p>Question 3.<br \/>\nDoes the sample produce a reasonable inference?<br \/>\n______<\/p>\n<p>Answer: No, the sample does not produce a reasonable inference. In samples 26, and 31,31,38 numbers represent defective batteries, and in shipment 50 out of 600 of the batteries are defective.<\/p>\n<p><strong>Essential Question Check-In<\/strong><\/p>\n<p>Question 4.<br \/>\nWhat can happen if a sample is too small or is not random?<\/p>\n<p>Answer: If the sample is too small or not random, it is likely to produce unrepresentative data values.<\/p>\n<h3><a id=\"Page_No_327\"><\/a> Page No. 327<\/h3>\n<p><strong>Maureen owns three bagel shops. Each shop sells 500 bagels per day. Maureen asks her store managers to use a random sample to see how many whole-wheat bagels are sold at each store each day. The results are shown in the table. Use the table for 5\u20137.<\/strong><br \/>\n<img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2020\/08\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-img-3.jpg\" alt=\"Go Math Grade 7 Answer Key Chapter 10 Random Samples and Populations img 3\" width=\"578\" height=\"113\" \/><\/p>\n<p>Question 5.<br \/>\nIf you assume the samples are representative, how many whole-wheat bagels might you infer are sold at each store?<br \/>\nShop A: ___________<br \/>\nShop B: ___________<br \/>\nShop C: ___________<\/p>\n<p>Answer:<br \/>\nShop A: 100.<br \/>\nShop B: 115.<br \/>\nShop C: 140.<\/p>\n<p>Explanation:<br \/>\nShop A:<br \/>\n10\/50\u00d7500<br \/>\n= 10\u00d710<br \/>\n= 100.<\/p>\n<p>Shop B:<br \/>\n23\/100\u00d7500<br \/>\n= 23\u00d75<br \/>\n= 115.<\/p>\n<p>Shop C:<br \/>\n7\/25\u00d7500<br \/>\n= 7\u00d720<br \/>\n= 140.<\/p>\n<p>Question 6.<br \/>\nRank the samples for the shops in terms of how representative they are likely to be. Explain your rankings.<\/p>\n<p>Answer: The samples can be ranked as C, A, B from least to most. Shop B&#8217;s is the most representative because it contained the most bagel. Shop C&#8217;s is the least representative because it contained the fewest bagels.<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-169078\" src=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-327-Q7.png\" alt=\"Go Math Grade 7 Answer Key Chapter 10 Random Samples and Populations Page 327 Q7\" width=\"670\" height=\"367\" srcset=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-327-Q7.png 670w, https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-327-Q7-300x164.png 300w\" sizes=\"(max-width: 670px) 100vw, 670px\" \/><\/p>\n<p>Question 8.<br \/>\nIn a shipment of 1,000 T-shirts, 75 do not meet quality standards. The table below simulates a manager\u2019s random sample of 20 T-shirts to inspect. For the simulation, the integers 1 to 75 represent the below-standard shirts.<br \/>\n<img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2020\/08\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-img-4.jpg\" alt=\"Go Math Grade 7 Answer Key Chapter 10 Random Samples and Populations img 4\" width=\"506\" height=\"59\" \/><\/p>\n<p>Answer: In the sample, two values are from 1 to 75. So, 2 shirts are below the quality standards. So<br \/>\n= 2\/20\u00d71000<br \/>\n= 2\u00d750<br \/>\n= 100.<br \/>\nThe prediction would be that 100 shirts are below quality standards, which would be 25 more than the actual number.<\/p>\n<h3><a id=\"Page_No_328\"><\/a> Page No. 328<\/h3>\n<p>Question 9.<br \/>\nMultistep<br \/>\nA 64-acre coconut farm is arranged in an 8-by-8 array. Mika wants to know the average number of coconut palms on each acre. Each cell in the table represents an acre of land. The number in each cell tells how many coconut palms grow on that particular acre.<br \/>\n<img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2020\/08\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-img-5.jpg\" alt=\"Go Math Grade 7 Answer Key Chapter 10 Random Samples and Populations img 5\" width=\"315\" height=\"283\" \/><br \/>\na. The numbers in green represent Mika\u2019s random sample of 10 acres. What is the average number of coconut palms on the randomly selected acres?<br \/>\n______<\/p>\n<p>Answer: The average is 49.8 coconut palms.<\/p>\n<p>Explanation: The average is \\(\\frac{56+43+62+63+33+34+38+51+59+59}{10}<br \/>\n= \\frac{498}{10}\\)<br \/>\n= 49.8<\/p>\n<p>Question 9.<br \/>\nb. Project the number of palms on the entire farm.<br \/>\n______<\/p>\n<p>Answer: 3187 palms.<\/p>\n<p>Explanation: As the average is 49.8 for each acre, so for 64 acres it is 64\u00d749.8= 3187.2. So the number of palms on the entire farm is 3187.<\/p>\n<p><strong>H.O.T.<\/strong><\/p>\n<p><strong>Focus on Higher Order Thinking<\/strong><\/p>\n<p>Question 10.<br \/>\nDraw Conclusions<br \/>\nA random sample of 15 of the 78 competitors at a middle school gymnastics competition is asked about their height. The data set lists the heights in inches: 55, 57, 57, 58, 59, 59, 59, 59, 59, 61, 62, 62, 63, 64, 66. What is the mean height of the sample? Do you think this is a reasonable prediction of the mean height of all competitors? Explain.<\/p>\n<p>Answer: Yes, this is a reasonable prediction.<\/p>\n<p>Explanation: The mean height is \\(\\frac{55+57+57+58+59+59+59+59+59+61+62+62+63+64+66}{15}<br \/>\n= \\frac{900}{15}\\)<br \/>\n= 60 inches.<br \/>\nYes, this is a reasonable prediction of the mean height of all competitors because it is a good sample generated randomly and contains sufficient values. So it should provide a good estimate of the mean height of all competitors.<\/p>\n<p>Question 11.<br \/>\nCritical Thinking<br \/>\nThe six-by-six grid contains the ages of actors in a youth Shakespeare festival. Describe a method for randomly selecting 8 cells by using number cubes. Then calculate the average of the 8 values you found.<br \/>\n<img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2020\/08\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-img-6.jpg\" alt=\"Go Math Grade 7 Answer Key Chapter 10 Random Samples and Populations img 6\" width=\"237\" height=\"212\" \/><\/p>\n<p>Answer: The average is 15.<\/p>\n<p>Explanation: We can roll a number cube twice and record each value. The first value will be the row number and the second will be the column number we repeat the process 8 times in order to get 8 ages from the grid. 12,10,21,9,18,16,14,20.<br \/>\nThe mean is \\(\\frac{12+10+21+9+18+16+14+20}{6}<br \/>\n= \\frac{120}{8}\\)<br \/>\n= 15<\/p>\n<p>Question 12.<br \/>\nCommunicating Mathematical Ideas<br \/>\nDescribe how the size of a random sample affects how well it represents a population as a whole.<\/p>\n<p>Answer: The bigger the size of the random sample, the more likely it so accurately represents the population.<\/p>\n<h3><a id=\"10_1_Populations_and_Samples_Page_No_329\"><\/a>10.1 Populations and Samples &#8211; Page No. 329<\/h3>\n<p>Question 1.<br \/>\nA company uses a computer to identify their 600 most loyal customers from its database and then surveys those customers to find out how they like their service. Identify the population and determine whether the sample is random or biased.<br \/>\nThe sample is _______<\/p>\n<p>Answer: The population is the customers in the company&#8217;s database. The sample is biased because instead of surveying all of their customers, the company only surveyed their most loyal customers.<\/p>\n<p><strong>10.2 Making Inferences from a Random Sample<\/strong><\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-169079\" src=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-329-Q2.png\" alt=\"Go Math Grade 7 Answer Key Chapter 10 Random Samples and Populations Page 329 Q2\" width=\"678\" height=\"510\" srcset=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-329-Q2.png 678w, https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-329-Q2-300x226.png 300w\" sizes=\"(max-width: 678px) 100vw, 678px\" \/><\/p>\n<p><strong>10.3 Generating Random Samples<\/strong><\/p>\n<p>A store receives a shipment of 5,000 MP3 players. In a previous shipment of 5,000 MP3 players, 300 were defective. A store clerk generates random numbers to simulate a random sample of this shipment. The clerk lets the numbers 1 through 300 represent defective MP3 players, and the numbers 301 through 5,000 represent working MP3 players. The results are given.<br \/>\n13 2,195 3,873 525 900 167 1,094 1,472 709 5,000<\/p>\n<p>Question 3.<br \/>\nBased on the sample, how many of the MP3 players might the clerk predict would be defective?<br \/>\n_______ MP3&#8217;s<\/p>\n<p>Answer: 1000 MP3&#8217;s.<\/p>\n<p>Explanation: As the two random numbers are 13 and 167 as they are less than 300 and thus represent defective MP3 players. And the other 8 numbers are greater than 300 and represent working MP3 players. So the total number of randomly generated numbers is 10.<br \/>\n2\/10 = X\/5000<br \/>\n1\/5 = X\/5000<br \/>\nX = 1000.<br \/>\nSo, about 1000 MP3 players are defective.<\/p>\n<p>Question 4.<br \/>\nCan the manufacturer assume the prediction is valid? Explain.<br \/>\n_______<\/p>\n<p>Answer: No.<\/p>\n<p>Explanation: As the manufacturer cannot assume the prediction is valid. As the sample size of 10 is too small compared to the size of the shipment.<\/p>\n<p><strong>Essential Question<\/strong><\/p>\n<p>Question 5.<br \/>\nHow can you use random samples to solve real-world problems?<\/p>\n<p>Answer: We can use random samples to make a prediction about the population that is too large to survey.<\/p>\n<h3><a id=\"Selected_Response_Page_No_330\"><\/a>Selected Response &#8211; Page No. 330<\/h3>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-169080\" src=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-330-Q1.png\" alt=\"Go Math Grade 7 Answer Key Chapter 10 Random Samples and Populations Page 330 Q1\" width=\"673\" height=\"524\" srcset=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-330-Q1.png 673w, https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-330-Q1-300x234.png 300w\" sizes=\"(max-width: 673px) 100vw, 673px\" \/><br \/>\n<img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-169081\" src=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-330-Q1.1.png\" alt=\"Go Math Grade 7 Answer Key Chapter 10 Random Samples and Populations Page 330 Q1.1\" width=\"631\" height=\"255\" srcset=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-330-Q1.1.png 631w, https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-330-Q1.1-300x121.png 300w\" sizes=\"(max-width: 631px) 100vw, 631px\" \/><\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-169082\" src=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-330-Q2.png\" alt=\"Go Math Grade 7 Answer Key Chapter 10 Random Samples and Populations Page 330 Q2\" width=\"701\" height=\"656\" srcset=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-330-Q2.png 701w, https:\/\/ccssanswers.com\/wp-content\/uploads\/2022\/05\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-Page-330-Q2-300x281.png 300w\" sizes=\"(max-width: 701px) 100vw, 701px\" \/><\/p>\n<p>Question 3.<br \/>\nA pair of shoes that normally costs $75 is on sale for $55. What is the percent decrease in the price, to the nearest whole percent?<br \/>\nOptions:<br \/>\na. 20%<br \/>\nb. 27%<br \/>\nc. 36%<br \/>\nd. 73%<\/p>\n<p>Answer: 27%<\/p>\n<p>Explanation: The percent decrease in the price is \\(\\frac{75-55}{75}<br \/>\n= \\frac{20}{75}\\)<br \/>\n= 0.266= 27%<\/p>\n<p>Question 4.<br \/>\nWhich of the following is a random sample?<br \/>\nOptions:<br \/>\na. A radio DJ asks the first 10 listeners who call in if they liked the last song.<br \/>\nb. 20 customers at a chicken restaurant are surveyed on their favorite food.<br \/>\nc. A polling organization numbers all registered voters, then generates 800 random integers. The polling organization interviews the 800 voters assigned those numbers.<br \/>\nd. Rebecca used an email poll to survey 100 students about how often they use the internet.<\/p>\n<p>Answer:<br \/>\nA is biased because it is a voluntary survey.<br \/>\nB is biased because only 20 customers surveyed on their favorite food.<br \/>\nC is a sample because that is random.<br \/>\nD is biased students using email more likely to use the internet that students who don&#8217;t use email.<\/p>\n<p>Question 5.<br \/>\nEach cell in the table represents the number of people who work in one 25-square-block section of the town of Middleton. The mayor uses a random sample to estimate the average number of workers per block.<br \/>\n<img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/ccssanswers.com\/wp-content\/uploads\/2020\/08\/Go-Math-Grade-7-Answer-Key-Chapter-10-Random-Samples-and-Populations-img-7.jpg\" alt=\"Go Math Grade 7 Answer Key Chapter 10 Random Samples and Populations img 7\" width=\"331\" height=\"190\" \/><br \/>\na. The circled numbers represent the mayor\u2019s random sample. What is the mean number of workers in this sample?<br \/>\n______<\/p>\n<p>Answer: The mean is 54.<\/p>\n<p>Explanation: The mean is \\(\\frac{56+60+50+43+62+53}{6}<br \/>\n= \\frac{324}{6}\\)<br \/>\n= 54<\/p>\n<p>Question 5.<br \/>\nb. Predict the number of workers in the entire 25-block section of Middleton.<br \/>\n______<\/p>\n<p>Answer: 1,350.<\/p>\n<p>Explanation: As we know that the mean is 54 per block, so for the entire 25 block section, the number is 54\u00d725= 1,350.<\/p>\n<p><em>Summary:<\/em><\/p>\n<p>We wish the information given in the Go Math Answer Key Grade 7 Chapter 10 Random Samples &amp; Populations is helpful for you. The main aim of our team is to make you understand the concepts and improve your math skills. Learn the techniques and apply them in real-time this helps you to perform well in the exams. For any queries, you can comment in the below comment box. 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