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Part 2 includes free-response problems using Minitab descriptive statistics for Dow Jones daily changes and applications to percentiles and transformations of body temperature between Celsius and Fahrenheit, plus letter-weight calculations for postage.",{"@graph":14,"@context":73},[15,34,56],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/document/","Document",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/document/exam/","Exam",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/document/the-practice-of-statistics-4e-chapter-2-part-1-multiple-choice/469462/",4,{"url":32,"name":10,"@type":35,"image":36,"author":41,"headline":10,"publisher":44,"fileFormat":47,"inLanguage":8,"description":12,"dateModified":48,"datePublished":49,"encodingFormat":47,"isAccessibleForFree":50,"interactionStatistic":51},"DigitalDocument",{"url":37,"@type":38,"width":39,"height":40},"https://docshare.wps.com/thumbnails/the-practice-of-statistics-4e-chapter-2-part-1-multiple-choice/469462.png","ImageObject",300,407,{"name":42,"@type":43},"Sarah ","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-10-21","2026-09-30",true,{"@type":52,"interactionType":53,"userInteractionCount":55},"InteractionCounter",{"@type":54},"ViewAction",7,{"@type":57,"mainEntity":58},"FAQPage",[59,65,69],{"name":60,"@type":61,"acceptedAnswer":62},"How do the questions in Part 1 assess understanding of Normal distributions?","Question",{"text":63,"@type":64},"They ask about probabilities and proportions using normal models, such as estimating the percentage outside a given height range, interpreting density curves, using areas under the standard Normal curve, and identifying skewness from plots.","Answer",{"name":66,"@type":61,"acceptedAnswer":67},"What statistical output is given for the Dow Jones data in Part 2?",{"text":68,"@type":64},"Descriptive statistics for daily percentage changes in the Dow for the first three months of 2009 and 2010 are provided, including N, mean, standard deviation, min, quartiles, median, and maximum.",{"name":70,"@type":61,"acceptedAnswer":71},"What conversions and percentile calculations are required in the free-response section?",{"text":72,"@type":64},"One question asks to convert a normal body temperature model from Celsius to Fahrenheit, while others ask for percentiles and the proportion of letter weights exceeding a threshold that triggers additional postage.","https://schema.org",{"og:url":32,"og:type":75,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":77,"canonical":32},"index,follow",{"doc_id":79,"site_id":7},469462,1791299323,{"code":4,"msg":82,"data":83},"success",[84,88,92,95,100,105,109,114,119,122,126],{"id":22,"doc_module":4,"doc_module_name":25,"category_name":85,"show_sort_weight":86,"slug":87},"Story & Novel",90,"story-novel",{"id":26,"doc_module":4,"doc_module_name":25,"category_name":89,"show_sort_weight":90,"slug":91},"Literature",80,"literature",{"id":33,"doc_module":4,"doc_module_name":25,"category_name":29,"show_sort_weight":93,"slug":94},70,"exam",{"id":96,"doc_module":4,"doc_module_name":25,"category_name":97,"show_sort_weight":98,"slug":99},5,"Comic",60,"comic",{"id":101,"doc_module":4,"doc_module_name":25,"category_name":102,"show_sort_weight":103,"slug":104},6,"Technology",50,"technology",{"id":55,"doc_module":4,"doc_module_name":25,"category_name":106,"show_sort_weight":107,"slug":108},"Healthcare",40,"healthcare",{"id":110,"doc_module":4,"doc_module_name":25,"category_name":111,"show_sort_weight":112,"slug":113},8,"Research & Report",30,"research-report",{"id":115,"doc_module":4,"doc_module_name":25,"category_name":116,"show_sort_weight":117,"slug":118},9,"Religion & Spirituality",20,"religion-spirituality",{"id":117,"doc_module":4,"doc_module_name":25,"category_name":120,"show_sort_weight":117,"slug":121},"World Cup","world-cup",{"id":123,"doc_module":4,"doc_module_name":25,"category_name":124,"show_sort_weight":123,"slug":125},10,"Lifestyle","lifestyle",{"id":127,"doc_module":4,"doc_module_name":25,"category_name":128,"show_sort_weight":96,"slug":129},19,"General","general",{"code":4,"msg":82,"data":131},{"doc_id":79,"user_id":132,"nickname":42,"user_avatar":133,"doc_module":4,"category_id":33,"category_name":29,"doc_title":10,"doc_description":12,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":55,"is_deleted":4,"is_public":22,"is_downloadable":22,"audit_status":22,"page_count":96,"language":139,"language_code":8,"site_id":7,"html_lang":8,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":12,"update_tm":143,"read_time":144},962085320529,"https://ap-avatar.wpscdn.com/davatar_9964176cb1d06d4a9deccf72a44ae3dc","Part 1: Multiple Choice. Circle the letter corresponding to the best answer.  \n1. The heights of American men aged 18 to 24 are approximately Normally distributed with a mean of 68 inches and a standard deviation of 2.5 inches. Only about 5% of young men have  \nheights outside the range (a) 65.5 inches to 70.5 inches (b) 63 inches to 73 inches (c) 60.5 inches to 75.5 inches (d) 58 inches to 78 inches (e) none of the above  \n2. Use the information in the previous problem. About what percentage of the men are over 70.5 inches tall?  \n(a) 2.5 (b) 5 (c) 16  \n(d) 32  \n(e) 68  \n3. For the density curve shown to the right, which statement is true?  \n(a) The area under the curve between 0 and 1 is 1.  \n(b) The density curve is symmetric.  \n(c) The density curve is skewed right.  \n(d) The density curve is Normal.  \n(e) None of the above is correct.  \n4. For the density curve shown in Question 3, which statement is true?  \n(a) The mean and median are equal.  \n(b) The mean is greater than the median.  \n(c) The mean is less than the median.  \n(d) The mean could be either greater than or less than the median.  \n(e) None of the above is correct.  \n5. The area under the standard Normal curve corresponding to –0.3 \u003C Z \u003C 1.6 is  \n(a) 0.3273 (b) 0.4713 (c) 0.5631 (d) 0.9542 (e) none of the above  \n© 2011 BFW Publishers The Practice of Statistics, 4/e-Chapter 2 75  \n6. The graph at right is a Normal probability plot for the amount of rainfall (in acre-feet) obtained from 26 randomly selected clouds that were seeded with silver oxide. Which of the following statements about the shape of the rainfall distribution is true?  \n(a) The distribution is Normal.  \n(b) The distribution is approximately Normal.  \n(c) The distribution is skewed left.  \n(d) The distribution has no potential outliers.  \n(e) The distribution is skewed right.  \n7. The distribution of the time it takes for different people to solve a certain crossword puzzle is strongly skewed to the right, with a mean of 30 minutes and a standard deviation of 15 minutes. The distribution of z-scores for those times is  \n(a) Normally distributed, with mean 30 and standard deviation 15.  \n(b) Skewed to the right, with mean 30 and standard deviation 15.  \n(c) Normally distributed, with mean 0 and standard deviation 1.  \n(d) Skewed to the right, with mean 0 and standard deviation 1.  \n(e) Skewed to the right, but the mean and standard deviation cannot be determined without more information.  \nz-score  \n8. The cumulative relative frequency graph at right shows the distribution of lengths (in centimeters) of fingerlings at a fish hatchery. The interquartile range for this distribution is approximately:  \n(a) 0.18 to 0.85 centimeters (b) 5 to 7 centimeters (c) 5.5 to 6.7 centimeters (d) 1.2 centimeters  \n(e) 2 centimeters  \n9. Which of the following properties is true for all Normal density curves?  \nI. They are symmetric.  \nII. The curve reaches its peak at the mean.  \nIII. 95% percent of the area under the curve is within one standard deviation of the mean.  \n(a) I only  \n(b) II only  \n(c) I and II only  \n(d) I and III only  \n(e) All three statements are correct.  \n76 The Practice of Statistics, 4/e-Chapter 2 © 2011 BFW Publishers  \n10. A fire department in a rural county reports that its response time to fires is approximately Normally distributed with a mean of 22 minutes and a standard deviation of 11.9 minutes. Approximately what proportion of their response times is over 30 minutes?  \n(a) 0.03 (b) 0.21 (c) 0.25 (d) 0.75 (e) 0.79  \n© 2011 BFW Publishers The Practice of Statistics, 4/e-Chapter 2 77  \nPart 2: Free Response  \nShow all your work. Indicate clearly the methods you use, because you will be graded on the correctness of your methods as well as on the accuracy and completeness of your results and explanations.  \nThe Dow Jones Industrial Average (“The Dow”) is an index measuring the stock performance of 30 large American companies, and is often used as a measure of overall economic growth ","cbCaihLGvl065sbN","https://ap.wps.com/l/cbCaihLGvl065sbN","pdf",184584,"English","# Part 1: Multiple Choice\n## Questions 1-10\n# Part 2: Free Response\n## Questions 11-17","[{\"question\":\"How do the questions in Part 1 assess understanding of Normal distributions?\",\"answer\":\"They ask about probabilities and proportions using normal models, such as estimating the percentage outside a given height range, interpreting density curves, using areas under the standard Normal curve, and identifying skewness from plots.\"},{\"question\":\"What statistical output is given for the Dow Jones data in Part 2?\",\"answer\":\"Descriptive statistics for daily percentage changes in the Dow for the first three months of 2009 and 2010 are provided, including N, mean, standard deviation, min, quartiles, median, and maximum.\"},{\"question\":\"What conversions and percentile calculations are required in the free-response section?\",\"answer\":\"One question asks to convert a normal body temperature model from Celsius to Fahrenheit, while others ask for percentiles and the proportion of letter weights exceeding a threshold that triggers additional postage.\"}]","The Practice of Statistics 4/e - Chapter 2 - Part 1 - Multiple Choice | PDF",1790775682,13]