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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 (se ad campaign. Let p, denote the proportion of customers purchasing pretzels before the ad campaign and let p, denote the proportion of customers purchasing pretzels after the ad campaign. Use the TI-84 Plus calculator and round the answers to three decimal places. A 99.5% confidence interval for the difference between the proportion of customers purchasing pretzels before and after the ad campaign is W

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 (se ad campaign. Let p, denote the proportion of customers purchasing pretzels before the ad campaign and let p, denote the proportion of customers purchasing pretzels after the ad campaign. Use the TI-84 Plus calculator and round the answers to three decimal places. A 99.5% confidence interval for the difference between the proportion of customers purchasing pretzels before and after the ad campaign is W

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
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 (se ad campaign. Let p, denote the proportion of customers purchasing pretzels before the ad campaign and let p, denote the proportion of customers purchasing pretzels after the ad campaign. Use the TI-84 Plus calculator and round the answers to three decimal places. A 99.5% confidence interval for the difference between the proportion of customers purchasing pretzels before and after the ad campaign is Part: 1/ 2 Submit Assig Continue O 2021 McGraw-Hill Education. All Rights Reserved. Terms of Use Privacy Ac 96% P Type here to search PriSc Insert Delee F11 F12 F10 F8 F9 F7
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 (se ad campaign. Let p, denote the proportion of customers purchasing pretzels before the ad campaign and let p, denote the proportion of customers purchasing pretzels after the ad campaign. Use the TI-84 Plus calculator and round the answers to three decimal places. A 99.5% confidence interval for the difference between the proportion of customers purchasing pretzels before and after the ad campaign is Part: 1/ 2 Submit Assig Continue O 2021 McGraw-Hill Education. All Rights Reserved. Terms of Use Privacy Ac 96% P Type here to search PriSc Insert Delee F11 F12 F10 F8 F9 F7
A 99.5% confidence interval for the difference between the proportion of customers purchasing pretzels before and after the ad campaign is <P1 P2<. Part: 1/2 Part 2 of 2 (b) A marketing manager claims that the proportion of customers who purchased pretzels did not change after the ad campaign. Does the confidence interval contradict this claim? v 0, it (Choose one) the claim that the proportion of Because the confidence interval (Choose one) customers who purchased pretzels did not change after the ad campaign. Submit Assignr Continue O 2021 McGraw-Hill Education. All Rights Reserved Terms of Use| PrivacyI Acce 96% O Type here to search PriSc Insert Delete C F5 F11 F12 F8 F9 F10 F6 F7 F1 F2 F3 F4
Transcribed Image Text:A 99.5% confidence interval for the difference between the proportion of customers purchasing pretzels before and after the ad campaign is <P1 P2<. Part: 1/2 Part 2 of 2 (b) A marketing manager claims that the proportion of customers who purchased pretzels did not change after the ad campaign. Does the confidence interval contradict this claim? v 0, it (Choose one) the claim that the proportion of Because the confidence interval (Choose one) customers who purchased pretzels did not change after the ad campaign. Submit Assignr Continue O 2021 McGraw-Hill Education. All Rights Reserved Terms of Use| PrivacyI Acce 96% O Type here to search PriSc Insert Delete C F5 F11 F12 F8 F9 F10 F6 F7 F1 F2 F3 F4
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