INTRODUCTORY STATISTICS (LOOSELEAF)3rd EditionGould Publisher: PEARSONISBN: 9780135163146
INTRODUCTORY STATISTICS (LOOSELEAF)
Solutions for INTRODUCTORY STATISTICS (LOOSELEAF)
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 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 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 45SE:
Streaming Services (Example 10) According to a 2017 Pew Research survey, 60 of young Americans aged...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 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 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 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 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 86CRE:
College Enrollment (Women) According to the Bureau of Labor Statistics, 71.9 of young women enroll...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 96CRE:
School Bond Suppose a political consultant is hired to determine if a school bond is likely to pass...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...Browse All Chapters of This Textbook
Chapter 1 - Introduction To DataChapter 2 - Picturing Variation With GraphsChapter 3 - Numerical Summaries Of Center And VariationChapter 4 - Regression Analysis: Exploring Associations Between VariablesChapter 5 - Modeling Variation With ProbabilityChapter 6 - Modeling Random Events: The Normal And Binomial ModelsChapter 7 - Survey Sampling And InferenceChapter 8 - Hypothesis Testing For Population ProportionsChapter 9 - Inferring Population MeansChapter 10 - Associations Between Categorical Variables
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