INTRODUCTION TO STATISTICS & DATA ANALYS

6th Edition

ISBN: 9780357420447

Author: PECK

Publisher: CENGAGE L

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.

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Textbook Question

Chapter 10.1, Problem 7E

A national survey of 1012 adult Americans conducted by Gallup (“Americans Still Generally Upbeat About Personal Finances,” gallup.com, January 25, 2016, retrieved November 16, 2016) asked survey participants if they thought they were in better financial shape than they were 1 year ago. Suppose that you want to determine if the survey data provide convincing evidence that a majority of adult Americans believe they are in better financial shape than 1 year ago. With p = the population proportion of adult Americans who believe they are better off， what hypotheses should you test?

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Chapter 10 Solutions

INTRODUCTION TO STATISTICS & DATA ANALYS

Ch. 10.1 - Explain why the statement x=50 is not a legitimate...Ch. 10.1 - For the following pairs, indicate which do not...Ch. 10.1 - To determine whether the pipe welds in a nuclear...Ch. 10.1 - According to an article in Science Daily (Still No...Ch. 10.1 - A press release about a paper that appeared in The...Ch. 10.1 - CareerBuilder.com conducted a survey to learn...Ch. 10.1 - A national survey of 1012 adult Americans...Ch. 10.1 - A researcher speculates that because of...Ch. 10.1 - A county commissioner must vote on a resolution...Ch. 10.1 - A cruise ship charges passengers 3 for a can of...

Ch. 10.1 - The article Facebook Use and Academic Performance...Ch. 10.2 - Researchers at Bostons Childrens Hospital and...Ch. 10.2 - The paper Breast MRI as an Adjunct to Mammography...Ch. 10.2 - Medical personnel are required to report suspected...Ch. 10.2 - How accurate are DNA paternity tests? By comparing...Ch. 10.2 - A television manufacturer claims that (at least)...Ch. 10.2 - A manufacturer of hand-held calculators receives...Ch. 10.2 - Water specimens are taken from water used for...Ch. 10.2 - Suppose that for a particular hypothesis test, the...Ch. 10.2 - Suppose that you arc an inspector for the Fish and...Ch. 10.2 - The paper Living Near Nuclear Power Plants and...Ch. 10.2 - An automobile manufacturer is considering using...Ch. 10.3 - Use the definition of the P-value to explain the...Ch. 10.3 - For which of the following P-values will the null...Ch. 10.3 - Pairs of P-values and significance levels, , are...Ch. 10.3 - Pairs of P-values and significance levels are...Ch. 10.3 - Let p denote the proportion of students at a...Ch. 10.3 - Assuming a random sample from a large population,...Ch. 10.3 - In a survey conducted by CareerBuilder.com,...Ch. 10.3 - In a survey of 1000 women age 22 to 35 who work...Ch. 10.3 - The paper Debt Literacy, Financial Experiences and...Ch. 10.3 - Most Like it Hot is the title of a press release...Ch. 10.3 - In a survey of 1005 adult Americans, 46% indicated...Ch. 10.3 - The article Euthanasia Still Acceptable to Solid...Ch. 10.3 - The report Digital Democracy Survey (Deloitte...Ch. 10.3 - The article How to Block Nuisance Calls (The...Ch. 10.3 - The article Facebook Use and Academic Performance...Ch. 10.3 - The article Public Acceptability in the UK and the...Ch. 10.3 - The article Cops Get Screened for Digital Dirt...Ch. 10.3 - Refer back to the previous exercise. The actual...Ch. 10.3 - The report 2007 Electronic Monitoring ...Ch. 10.3 - The United States Elections Project...Ch. 10.4 - Give as much information as you can about the...Ch. 10.4 - Give as much information as you can about the...Ch. 10.4 - Give as much information as you can about the...Ch. 10.4 - Paint used to paint lines on roads must reflect...Ch. 10.4 - A certain pen has been designed so that actual...Ch. 10.4 - Prob. 48E Ch. 10.4 - The paper Playing Active Video Games Increases...Ch. 10.4 - A study of fast-food intake is described in the...Ch. 10.4 - Refer to the study and hypothesis test of the...Ch. 10.4 - The report 2016 Salary Survey Executive Summary...Ch. 10.4 - The Economist collects data each year on the price...Ch. 10.4 - The report Majoring in Money: How American College...Ch. 10.4 - The authors of the paper Changes in Quantity,...Ch. 10.4 - Medical research has shown that repeated wrist...Ch. 10.4 - A comprehensive study conducted by the National...Ch. 10.4 - In a study of media use, each person in a large...Ch. 10.4 - Refer to the study description and sample...Ch. 10.4 - The paper titled Music for Pain Relief (The...Ch. 10.4 - Many consumers pay careful attention to stated...Ch. 10.4 - Much concern has been expressed regarding the...Ch. 10.5 - The power of a test is influenced by the sample...Ch. 10.5 - Water specimens are taken from water used for...Ch. 10.5 - Prob. 65E Ch. 10.5 - Let denote the mean lifetime (in hours) for a...Ch. 10.5 - The city council in a large city has become...Ch. 10.5 - The amount of shaft wear after a fixed mileage was...Ch. 10.5 - Optical fibers are used in telecommunications to...Ch. 10.5 - Let denote the mean diameter for bearings of a...Ch. 10.5 - Use the information given in the previous exercise...Ch. 10.6 - In 2006, Boston Scientific sought approval for a...Ch. 10.6 - The article Boy or Girl: Which Gender Baby Would...Ch. 10.7 - We are only beginning to learn about the long-term...Ch. 10.7 - A study of hospitalized patients who develop...Ch. 10.7 - Prob. 76E Ch. 10.7 - Prob. 77E Ch. 10.7 - Prob. 78E Ch. 10.7 - Prob. 79E Ch. 10.8 - Prob. 80E Ch. 10.8 - Prob. 81E Ch. 10.8 - Prob. 83E Ch. 10.8 - Prob. 84E Ch. 10 - The report A Crisis in Civic Education (American...Ch. 10 - In a national survey of 2013 adults, 1590...Ch. 10 - Students at the Akademia Podlaka conducted an...Ch. 10 - Prob. 89CR Ch. 10 - People in a random sample of 236 students enrolled...Ch. 10 - According to a large national survey conducted by...Ch. 10 - In a representative sample of adult Americans age...Ch. 10 - The article Facebook Use and Academic Performance...Ch. 10 - A number of initiatives on the topic of legalized...Ch. 10 - Duck hunting in populated areas faces opposition...Ch. 10 - Past experience has indicated that the response...Ch. 10 - An automobile manufacturer who wishes to advertise...Ch. 10 - A student organization uses the proceeds from a...Ch. 10 - A hot tub manufacturer advertises that with its...Ch. 10 - Prob. 1CRE Ch. 10 - Prob. 2CRE Ch. 10 - Prob. 3CRE Ch. 10 - Prob. 4CRE Ch. 10 - Prob. 5CRE Ch. 10 - The article Should Canada Allow Direct-to-Consumer...Ch. 10 - Prob. 7CRE Ch. 10 - It probably wouldnt surprise you to know that...Ch. 10 - The article Doctors Cite Burnout in Mistakes (San...Ch. 10 - The National Geographic Society conducted a study...Ch. 10 - Heinz Plays Catch-up After Under-Filling Ketchup...Ch. 10 - In a survey conducted by Yahoo Small Business,...Ch. 10 - In an AP-AOL sports poll (Associated Press,...Ch. 10 - The article titled 13% of Americans Dont Use the...Ch. 10 - A survey of teenagers and parents in Canada...Ch. 10 - The same survey referenced in the previous...

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Solution Summary: The author explains the pair of test hypotheses that should be used for testing.

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Chapter 10 Solutions