Problem 1SE: Population vs. Sample (Example 1) In 2017 the Gallup poll surveyed 1021 adults in the United States... Problem 2SE: Population vs. Sample In 2017 Pew Research Center polled 3930 adults in the United States and found... Problem 3SE: Parameter vs. Statistic (Example 2) Bob Ross hosted a weekly television show, The Joy of Painting,... Problem 4SE: Parameter vs. Statistic The website scholarshipstats.com collected data on all 5341 NCAA basketball... Problem 5SE: x vs. Two symbols are used for the mean: and x. a. Which represents a parameter, and which a... Problem 6SE: vs. s Two symbols are used for the standard deviation: and s. a. Which represents a parameter, and... Problem 7SE: vs. x The mean weight of all professional NBA basketball players is 218.8 pounds. A sample of 50... Problem 8SE: vs. s The standard deviation of all professional NBA basketball players is 29.9 pounds. A sample of... Problem 9SE: Notation (Example 3) The city of San Francisco provides an open data set of commercial building... Problem 10SE: Notation The city of Chicago provides an open data set of the number of WiFi sessions at all of its... Problem 11SE: Samples and Populations (Example 4) Chapman University conducts an annual Survey of American Fears.... Problem 12SE: Samples and Populations The Centers for Disease Control and Prevention (CDC) conducts an annual... Problem 13SE: Sample vs. Census You are receiving a large shipment of batteries and want to test their lifetimes.... Problem 14SE: Sampling GPAs Suppose you want to estimate the mean grade point average (GPA) of all students at... Problem 15SE: Sampling with and without Replacement Explain the difference between sampling with replacement and... Problem 16SE: Simple Random Sampling Is simple random sampling usually done with or without replacement? Problem 17SE: Finding a Random Sample (Example 5) You need to select a simple random sample of four from eight... Problem 18SE: Finding a Random Sample You need to select a simple random sample of two from six friends who will... Problem 19SE: Random Sampling Assume your class has 30 students and you want a random sample of 10 of them.... Problem 20SE: Random Sampling with Coins Assume your class has 30 students and you want a random sample of 10 of... Problem 21SE: Survey Response (Example 6) A school district conducts a survey to determine whether voters favor... Problem 22SE: Survey Response To determine if patrons are satisfied with performance quality, a theater surveys... Problem 23SE: Views on Capital Punishment In carrying out a study of views on capital punishment, a student asked... Problem 24SE: Views on Capital Punishment Use the data given in Exercise 7.23. Make the two given tables into one... Problem 25SE: Targets: Bias or Lack of Precision? a. If a rifleman’s gunsight is adjusted incorrectly, he might... Problem 26SE: Targets: Bias or Lack of Precision, Again a. If a rifleman’s gunsight is adjusted correctly, but he... Problem 27SE: Bias? Suppose that, when taking a random sample of three students’ GPAs, you get a sample mean of... Problem 28SE: Unbiased Sample? Suppose you attend a school that offers both traditional courses and online... Problem 29SE: Proportion of Odd Digits A large collection of one-digit random numbers should have about 50 odd and... Problem 30SE: Proportion of Odd Digits 1,3,5,7,and9areoddand0,2,4,6,and8 are even. Consider a 30-digit line from a... Problem 31SE Problem 32SE Problem 33SE: ESP A Zener deck of cards has cards that show one of five different shapes with equal... Problem 34SE: ESP Again In the graphs for Exercise 7.33, explain how you can tell from the shape of the graph... Problem 35SE: Standard Error Which of the dotplots given in Exercise 7.33 has the largest standard error, and... Problem 36SE: Bias? Assuming that the true proportion of success for the trials shown in the graph for Exercise... Problem 37SE: Fair Coin? One of the graphs shows the proportion of heads from flipping a fair coin 10 times,... Problem 38SE: Far from Fair Which of the graphs in Exercise 7.37 is centered farthest from 0.50? Problem 39SE: Variation in Sample Proportions (Example 7) Suppose it is known that 20 of students at a certain... Problem 40SE: Variation in Sample Proportions Suppose it is known that 60 of employees at a company use a Flexible... Problem 41SE: Driver’s License (Example 8) According to a 2017 article in The Washington Post, 72 of high school... Problem 42SE: BA Attainment According to a 2017 Pew Research report, 40 of millennials have a BA degree. Suppose... Problem 43SE: Stress (Example 9) According to a 2017 Gallup poll, 80 of Americans report being afflicted by... Problem 44SE Problem 45SE: Streaming Services (Example 10) According to a 2017 Pew Research survey, 60 of young Americans aged... Problem 46SE Problem 47SE: Voting According to a 2017 Pew Research Center report on voting issues, 59 of Americans feel that... Problem 48SE: Instagram According to a 2018 Pew Research Center report on social media use, 28 of American adults... Problem 49SE: Super Bowl In 2018 it was estimated that approximately 45 of the American population watches the... Problem 50SE: College Enrollment According to data released in 2016, 69 of students in the United States enroll in... Problem 51SE: Color Blindness While the majority of people who are color blind are male, the National Eye... Problem 52SE: Blood Type Human blood is divided into 8 possible blood types. The rarest blood type is AB negative.... Problem 53SE Problem 54SE: Environment A 2017 Gallup poll found that 601 out of 1018 randomly selected adults in the United... Problem 55SE: Gun Control According to a 2017 Gallup Poll, 617 out of 1028 randomly selected adults living in the... Problem 56SE: Smokers According to a 2017 Gallup poll, 572 out of 1021 randomly selected smokers polled believed... Problem 57SE: Voting A random sample of likely voters showed that 55 planned to vote for Candidate X, with a... Problem 58SE: Voting A random sample of likely voters showed that 49 planned to support Measure X. The margin of... Problem 59SE Problem 60SE: Diabetes In a simple random sample of 1200 Americans age 20 and over, the proportion with diabetes... Problem 61SE: Marijuana Legalization A 2017 Gallup poll reported that 658 out of 1028 U.S. adults believe that... Problem 62SE: Organic Produce A 2016 Pew Research poll found that 61 of U.S. adults believe that organic produce... Problem 63SE: Democracy and Unpopular Views A 2017 survey of U.S. adults found that 74 believed that protecting... Problem 64SE: Democracy and Free Press A 2017 survey of U.S. adults found the 64 believed that freedom of news... Problem 65SE: Winter Olympics (Example 12) According to a 2018 Rasmussen Poll, 40 of American adults were very... Problem 66SE: Marijuana Use The Gallup poll reported that 45 of Americans have tried marijuana. This was based on... Problem 67SE: Past Presidential Vote In the 1960 presidential election, 34,226,731 people voted for Kennedy,... Problem 68SE: Batting Averages The website www.mlb.com compiles statistics on all professional baseball players.... Problem 69SE: Picky Eaters (Example 13) In a 2017 Harris poll conducted for Uber Eats, 438 of 1019 U.S. adults... Problem 70SE: Nutrition Labels Of 1019 U.S. adults responding to a 2017 Harris poll, 47 said they always or often... Problem 71SE Problem 72SE: Estimating Sample Size In the 2018 study Closing the STEM Gap, researchers wanted to estimate the... Problem 73SE: Happiness A Harris poll asked Americans in 2016 and 2017 if they were happy. In 2016, 31 reported... Problem 74SE: Artificial Intelligence A Harris poll asked a sample of U.S. adults if they agreed with the... Problem 75SE: Democratic (Examples 15, 16, 17, 18) Voters and the FBI In 2003 and 2017 Gallup asked Democratic... Problem 76SE: Trust in Judiciary In 2016 and 2017 Gallup asked American adults about their amount of trust they... Problem 77SE: Perry Preschool and Graduation from High School The Perry Preschool Project was created in the early... Problem 78SE: Preschool: Just the Boys Refer to Exercise 7.77 for information. This data set records results just... Problem 79SE Problem 80SE: Sugar-Sweetened Beverages In 2017, the journal Obesity reported on trends in sugar-sweetened... Problem 81SE: Gender and Use of Turn Signals Statistics student Hector Porath wanted to find out whether gender... Problem 82SE: Local TV News Pew Research reported that 46 of Americans surveyed in 2016 got their news from local... Problem 83SE: Drug for Nausea Ondansetron (Zofran) is a drug used by some pregnant women for nausea. There was... Problem 84SE: Preschool: Just the Girls The Perry Preschool Project was created in the early 1960s by David... Problem 85CRE Problem 86CRE: College Enrollment (Women) According to the Bureau of Labor Statistics, 71.9 of young women enroll... Problem 87CRE Problem 88CRE: Technology Anxiety In a 2018 survey conducted by Northeastern University, 28 of working adults with... Problem 89CRE: Sample Proportion A poll on a proposition showed that we are 95 confident that the population... Problem 90CRE: Sample Proportion A poll on a proposition showed that we are 99 confident that the population... Problem 91CRE: Margin of Error A poll on a proposition showed that we are 95 confident that the population... Problem 92CRE: Margin of Error A poll on a proposition showed that we are 99 confident that the population... Problem 93CRE: Dreaming in Color According to studies done in the 1940s, 29 of people dream in color. Assuming this... Problem 94CRE: Hand Washing Ignaz Semmelweiss (1818-1865) was the doctor who first encouraged other doctors to wash... Problem 95CRE Problem 96CRE: School Bond Suppose a political consultant is hired to determine if a school bond is likely to pass... Problem 97CRE Problem 98CRE Problem 99CRE: Voters Poll: Sample Size A polling agency wants to determine the sample size required to get a... Problem 100CRE: Ratio of Sample Sizes Find the sample size required for a margin of error of 3 percentage points,... Problem 101CRE: Criticize the Sampling Marco is interested in whether Proposition P will be passed in the next... Problem 102CRE: Criticize the Sampling Maria opposes capital punishment and wants to find out if a majority of... Problem 103CRE: Random Sampling? If you walked around your school campus and asked people you met how many keys they... Problem 104CRE: Biased Sample? You want to find the mean weight of the students at your college. You calculate the... Problem 105CRE: Bias? Suppose that, when taking a random sample of 4 from 123 women, you get a mean height of only... Problem 106CRE: Bias? Four women selected from a photo of 123 were found to have a sample mean height of 71 inches... Problem 107CRE: Sample Size Formula (Part 1) From Formula 7.2, an estimate for margin of error for a 95 confidence... Problem 108CRE: Sample Size Formula (Part 2) Using your result from Exercise 7.107, solve for n by (1) dividing both... format_list_bulleted