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 27 of them showed a purchase of the pretzels. Another simple random sample of 79 receipts was taken the week after the ad campaign, and 42 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 p₁ 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 X 5 campaign is
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 27 of them showed a purchase of the pretzels. Another simple random sample of 79 receipts was taken the week after the ad campaign, and 42 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 p₁ 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 X 5 campaign is
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: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 27 of them showed a purchase of the pretzels. Another simple random
sample of 79 receipts was taken the week after the ad campaign, and 42 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 p₁ 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 <
G
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