Statistics for Business & Economics, Revised (MindTap Course List)
12th Edition
ISBN: 9781285846323
Author: David R. Anderson, Dennis J. Sweeney, Thomas A. Williams, Jeffrey D. Camm, James J. Cochran
Publisher: South-Western College Pub

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Textbook Question
Chapter 10.4, Problem 35E

In a test of the quality of two television commercials, each commercial was shown in a separate test area six times over a one-week period. The following week a telephone survey was conducted to identify individuals who had seen the commercials. Those individuals were asked to state the primary message in the commercials. The following results were recorded.

 Commercial A Commercial B Number Who Saw Commercial 150 200 Number Who Recalled Message 63 60
1. a. Use α = .05 and test the hypothesis that there is no difference in the recall proportions for the two commercials.
2. b. Compute a 95% confidence interval for the difference between the recall proportions for the two populations.
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