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 98 convenience store receipts the week before the ad campaign began, and found that 26 of 00 them showed a purchase of the pretzels. Another simple random sample of 78 receipts was taken the week after the ad campaign, and 41 of them showed a pretzel purchase. Part: 0 / 2 Part 1 of 2 (a) Construct a 99.5% 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 99.5% confident that the difference between the proportions of customers purchasing pretzels before and after the ad 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 98 convenience store receipts the week before the ad campaign began, and found that 26 of 00 them showed a purchase of the pretzels. Another simple random sample of 78 receipts was taken the week after the ad campaign, and 41 of them showed a pretzel purchase. Part: 0 / 2 Part 1 of 2 (a) Construct a 99.5% 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 99.5% confident that the difference between the proportions of customers purchasing pretzels before and after the ad campaign is
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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![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 98 convenience store receipts the week before the ad campaign began, and found that 26 of
them showed a purchase of the pretzels. Another simple random sample of 78 receipts was taken the week after the ad
campaign, and 41 of them showed a pretzel purchase.
Part: 0 / 2
Part 1 of 2
(a) Construct a 99.5% 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 99.5% confident that the difference between the proportions of customers
<P1 - P2
<].
purchasing pretzels before and after the ad campaign is](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F231fae22-ac62-4382-9eb0-95d912af77d1%2Fb9f5e577-6a25-4c97-a7d0-47b9ec4a43ef%2Fdb6x5z8_processed.png&w=3840&q=75)
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 98 convenience store receipts the week before the ad campaign began, and found that 26 of
them showed a purchase of the pretzels. Another simple random sample of 78 receipts was taken the week after the ad
campaign, and 41 of them showed a pretzel purchase.
Part: 0 / 2
Part 1 of 2
(a) Construct a 99.5% 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 99.5% confident that the difference between the proportions of customers
<P1 - P2
<].
purchasing pretzels before and after the ad campaign is
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