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Get Full Access to Stats Modeling The World - 4 Edition - Chapter 14 - Problem 48
Get Full Access to Stats Modeling The World - 4 Edition - Chapter 14 - Problem 48

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# E-readers In 2011, 12% of Americans owned an electronic reader of some sort. Suppose

ISBN: 9780321854018 481

## Solution for problem 48 Chapter 14

Stats Modeling the World | 4th Edition

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Stats Modeling the World | 4th Edition

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Problem 48

E-readers In 2011, 12% of Americans owned an electronic reader of some sort. Suppose that 43% of people with e-readers read at least 3 books last year, while among people without an e-reader, only 11% read 3 or more books in the course of the year. a) Explain how these statistics indicate that owning an e-reader and reading 3 or more books are not independent. b) Whats the probability that a randomly selected American has read 3 or more books?

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Recommended Problems:Fourth Edition: 2.3.1, 2.3.2, 2.3.5, 2.3.11, 2.4.5, 2.4.3, 2.6.3 Fifth Edition: 2.3.1, 2.3.2. 2.3.5, 2.3.11, 2.4.5, 2.4.3, 2.6.3 Problems to be turned in:Fourth Edition: 2.2.1, 2.4.2, 2.3.12, 2.6.11Fifth Edition: 2.2.1, 2.4.2, 2.3.12, 2.6.11Complete the following problems as well. Note that no work is to be done on these pages.1.Suppose a constant, say a, is added to every value of a data set. Exactly how does this affect the mean, variance, and standard deviation when compared to the originals Why (No mathematical proof is needed.)2.Calculate the standard deviation of the following by hand (show all your work to receive full marks.):6, 12, 11, 13, 8, 103.Calculate the mean and standard deviation of each of the following samples by either calculator or

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