Answered: n brand of pretzel, a company obtained…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Transcribed Image Text:云。 < cO LO 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 96 convenience store receipts the week before the ad campaign began, and found that 25 of them showed a purchase of the pretzels. Another simple random sample of 76 receipts was taken the week after the ad campaign, and 40 of them showed a pretzel purchase. Part: 0/ 2 Part 1 of 2 (a) Construct a 99% 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% confident that the difference between the proportions of customers purchasing pretzels before and after the ad campaign is <P1¯ P2 < Notes DEC 08 F3 FB OL 64 F5 94 F4 $ 4 %23 % 8. 3.

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