Intro Statistics - Student's Solution Manual

4th Edition

ISBN: 9780321825483

Author: DeVeaux

Publisher: PEARSON

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.

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Textbook Question

Chapter 16, Problem 38E

Hiring In preparing a report on the economy, we need to estimate the percentage of businesses that plan to hire additional employees in the next 60 days.

a) How many randomly selected employers must we contact in order to create an estimate in which we are 98% confident with a margin of error of 5%?
b) Suppose we want to reduce the margin of error to 3%. What sample size will suffice?
c) Why might it not be worth the effort to try to get an interval with a margin of error of only 1%?

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Chapter 16, Problem 37E

Chapter 16, Problem 39E

Chapter 16 Solutions

Intro Statistics - Student's Solution Manual

Ch. 16.1 - A Pew Research study regarding cell phones asked...Ch. 16.1 - Prob. 2JC Ch. 16.1 - A Pew Research study regarding cell phones asked...Ch. 16.1 - Prob. 4JC Ch. 16.1 - Prob. 5JC Ch. 16.2 - Prob. 6JC Ch. 16.2 - Prob. 7JC Ch. 16.2 - Prob. 8JC Ch. 16 - Prob. 1E Ch. 16 - Prob. 2E

Ch. 16 - Prob. 3E Ch. 16 - Prob. 4E Ch. 16 - Prob. 5E Ch. 16 - 6. I asked, “How’s life?” In the Gallup poll...Ch. 16 - Prob. 7E Ch. 16 - Prob. 8E Ch. 16 - Margin of error A TV newscaster reports the...Ch. 16 - Another margin of error A medical researcher...Ch. 16 - Conditions For each situation described below,...Ch. 16 - More conditions Consider each situation described....Ch. 16 - Conclusions A catalog sales company promises to...Ch. 16 - More conclusions In January 2002, two students...Ch. 16 - Confidence intervals Several factors are involved...Ch. 16 - Confidence intervals, again Several factors are...Ch. 16 - Cars What fraction of cars made in Japan? The...Ch. 16 - Prob. 18E Ch. 16 - Prob. 19E Ch. 16 - Prob. 20E Ch. 16 - Prob. 21E Ch. 16 - Prob. 22E Ch. 16 - 23. Contributions, please The Paralyzed Veterans...Ch. 16 - Take the offer First USA, a major credit card...Ch. 16 - Teenage drivers An insurance company checks police...Ch. 16 - Junk mail Direct mail advertisers send...Ch. 16 - Prob. 27E Ch. 16 - Prob. 28E Ch. 16 - Prob. 29E Ch. 16 - Gambling A city ballot includes a local initiative...Ch. 16 - Rickets Vitamin D, whether ingested as a dietary...Ch. 16 - Teachers A 2011 Gallup poll found that 76% of...Ch. 16 - Prob. 33E Ch. 16 - Back to campus ACT, Inc. reported that 74% of 1644...Ch. 16 - Deer ticks Wildlife biologists inspect 153 deer...Ch. 16 - Prob. 36E Ch. 16 - Graduation Its believed that as many as 25% of...Ch. 16 - Hiring In preparing a report on the economy, we...Ch. 16 - Prob. 39E Ch. 16 - Prob. 40E Ch. 16 - Prob. 41E Ch. 16 - Another pilot study During routine screening, a...Ch. 16 - Prob. 43E Ch. 16 - Amendment A TV news reporter says that a proposed...

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