8th Edition

ISBN: 9781337558198

Author: BRASE

Publisher: CENGAGE L

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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 11.1, Problem 8P

Interpretation: Test of Independence Consider Charlotte's study of source of fraud/identity theft and gender (see Problem 6). She computed sample X 2 = 10.2 .

(a) How many degrees of freedom are used? Recall that there were 5 sources of fraud/identity theft and, of course. 2 genders. Approximate the P-value and conclude the test at the 5% level of significance. Would it seem that gender and source of fraud/identity theft are independent?

(b) From this study, can Charlotte identify which source of fraud/identity theft is dependent with respect to gender? Explain.

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Chapter 11.1, Problem 7P

Chapter 11.1, Problem 9P

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Chapter 11 Solutions

UNDERSTANDING BASIC STATISTICS (LOOSE)

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Solution Summary: The author explains that there are 4 degrees of freedom, reject null hypothesis, and conclude that gender and source of fraud/identify theft are independent.

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Chapter 11 Solutions