Answered: (a) Construct a 99.8% confidence…

College Algebra

10th Edition

ISBN:9781337282291

Author:Ron Larson

Publisher:Ron Larson

Chapter8: Sequences, Series,and Probability

Section8.6: Counting Principles

Problem 58E: Forming an Experimental Group To conduct an experiment, researchers randomly select five students...

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Transcribed Image Text:Pretzels: In order to judge the effectiveness of an advertising campaign for a certain brand of pretzel, a company obtained a simple random sample of 99 convenience store receipts the week before the ad campaign began, and found that 22 of them showed a purchase of the pretzels. Another simple random sample of 79 receipts was taken the week after the ad campaign, and 29 of them showed a pretzel purchase. Part: 0 / 2 Part 1 of 2 (a) Construct a 99.8% confidence interval for the difference between the proportions of customers purchasing pretzels before and after the ad campaign. Let p, denote the proportion of customers purchasing pretzels before the ad campaign. Use tables to find the critical value and round the answer to at least three decimal places. A 99.8% confident that the difference between the proportions of customers purchasing pretzels before and after the ad campaign is <P1 ¯ P2

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