rain volume 28. Storks and Babies In the years following the end of World War II, it was found that there was a strong correlation, or association, between the number of human births and the stork population. It therefore follows that storks cause babies. 30. Online Shopping In a Consumer Reports Research Center Telephone survey of 427 women, 38% said that they purchased clothing online. a. What is the exact value that is 38% of 427? b. Could the result from part (a) be the actual number of women who said that they purchase clothing online? Why or why not? c. What is the actual number of women who said that they purchase clothing online? d. Among the 427 respondents, 30 said that they purchase electronics online. What percent- age of the women said that they purchase electronics online? PAGE 6ordinal, B 18. Exit Polls On the day of the last presidential election, ABC News organized an exit poll left the premises. in which specific polling stations were randomly selected and all voters were surveyed as they 19. Literary Digest Poll In 1936, Literary Digest magazine mailed questionnaires to 10 million people and obtained 2,266,566 responses. The responses indicated that Alf Landon would win the presidential election, but Franklin D. Roosevelt actually won the election. Simple Random Samples. In Exercises 21-26, determine whether the sample is a simple random sample. Give a brief explanation of your choice. 21. Bayer Aspirin Bayer HealthCare LLC produces low-dose aspirin pills designed to contain 81 mg of aspirin. Because each pill contains other ingredients, including corn starch, talc, and pro- pylene glycol, it is difficult to check whether manufactured pills contain 81 mg of aspirin. A qual- ity control plan is to select every 1000th pill, which is then tested for the correct amount of aspirin. MA 24. Jury Selection According to the State of New York Unified Court System, names of potential jurors are selected from a variety of different sources. When a trial requires a jury, names from the list are randomly selected in a way that is equivalent to writing the names on slips of paper, mixing them in a bowl, and selecting the required number of potential jurors. ave PAGE 12Collecting Sample Data pt to modify subjects in stud Lab Assignment Name: Section 1.2 and 1.3 Due Date: mple of the same size n Math 34 This Lab is to be worked in the Math Lab when an instructor is present. You may work with your classmates, but be sure to complete your own assignment to turn in. To receive credit for this assignment you must log in at least 2 hours each week. for the 4. Identifying the Population In a Gallup poll of 1010 adults in the United States, 55% of the respondents said that they used local TV stations daily as a source of news. Is the 1010 value a statistic or a parameter? Is the 55% value a statistic or a parameter? Describe the meIT AS population. th 9 In Exercises 5-12, determine whether the given value is a statistic or a parameter. WM 5. Distracted Driving In a AAA Foundation for Traffic Safety survey, 21% of the respons dents said that they recently texted or e-mailed while driving. 6. States There are 50 state capitols in the United States. 7. Titanic A study was conducted of all 2223 passengers aboard the Titanic when it sank. ive, /53 8. Late Flights Among the flights included in the sample of flights in Data Set 15 of Appendix B, 21% arrived late. Must have 9. IQ Scores The mean IQ score for subjects taking the Wechsler Adult Intelligence Scale IQ test is 100. In Exercises 13-20, determine whether the given values are from a discrete or continuous data set. 16. First President George Washington was 188 cm tall. 17. House of Representatives Currently the House of Representatives has 435 members. 20. Arm Circumference From Data Set 1 in Appendix B we see that a female had an arm circumference of 27.5 cm. PAGE 1028. Storks and Babies In the years following the end there was a strong correlation, or association, between stork population. It therefore follows that storks ca In Exercises 21-24, refer to the data in the table below. The IQ score and brain volume are listed for each of five different subjects. (The values are from Data Set 6 in Appendix B.) IQ Score and Brain Volume Subjec 2 3 4 5 IQ Score 87 (27 101 94 97 Brain Volume (cm3) 1035 1034 1173 1347 1029 22. Conclusion Given the context of the data in the table, what issue can be addressed by conducting a statistical analysis of the measurements? 30. Online Sh women, 38% a. What i b. Co 24. Conclusion If we were to use such data and conclude that there is a correlation or as- clor higher IQ scores? sociation between IQ score and brain volume, does it follow that larger brains are the cause of What's Wrong? In Exercises 25-28, identify what is wrong. 25. Potatoes In a poll sponsored by the Idaho Potato Commission, 1000 adults were asked 26% of the respondents. to select their favorite vegetables, and the favorite choice was potatoes, which were selected by PAGE 518. Exit Polls On the day of the last presidential elect in which specific polling stations were randomly sel In Exercises 21-28, determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate. left the premises. 19. Literary Digest Poll In 1936, Li 21. Colors of M&Ms (red, orange, yellow, brown, blue, green) listed in Data Set 20 in Appendix B people and obtained 2,266,566 res win the presidential election, but 23. Years in which U.S. presidents were inaugurated Simple Random Sam simple random sam 24. The movie Avatar was given a rating of 4 stars on a scale of 5 stars. 21. Bayer Asp 81 mg of aspir pylene gly 28. Body temperatures (in degrees Fahrenheit) listed in Data Set 3 of Appendix B ity cont In Exercise 32, identity the level of measurement and state what is wrong with the calculation 32. World Series Champs As of this writing, the New York Yankees were the last team to win the World Series, and the numbers of the starting lineup are 2, 18, 25, 13, 20, 55, 24, 33, and 53. The average (mean) of those numbers is 27.0. Section 1.3 In Exercises 9-20, identify which of these types of sampling is used: random, systematic, con- venience, stratified, or cluster. 9. Harry Potter The author collected sample data by randomly selecting 12 different pages from Harry Potter and the Sorcerer's Stone and then finding the number of words in each sen- rence on each of those pages. 12. Ecology When collecting data from different sample locations in a lake, a researcher uses interval of 5 meters. the "line transect method" by stretching a rope across the lake and collecting samples at every PAGE 11ities than to whites. Lab Assignment Name : Section 1.1 Due Date: Math 34 This Lab is to be worked in the Math Lab when an instructor is present. You may work with your classmates, but be sure to complete your own assignment to turn in. To receive credit for this assignment you must log in at least 2 hours each week. Consider the Source. In Exercises 5-8, determine whether the given source has the po- tential to create a bias in a statistical study. 6. Body Measurements Data Set 1 in Appendix B includes body measurements obtained by the U.S. Department of Health and Human Services, National Center for Health Statistics. 8. Chocolate An article in Journal of Nutrition (Vol. 130, No. 8) noted that chocolate is rich in flavonoids. The article notes that "regular consumption of foods rich in flavonoids may reduce the risk of coronary heart disease." The study received funding from Mars, Inc., the candy company, and the Chocolate Manufacturers Association. 34. Percentages in Advertising In an ad for the Club, a device used to discourage car thefts, it was stated that "The Club reduces your odds of car theft by 400%." What is wrong with this statement? PAGE 4 SONT