(a) Construct a 90% 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 90% confident that the difference between the proportions of customers purchasing pretzels before and after the ad campaign is
(a) Construct a 90% 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 90% 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 92 convenience store receipts the week before the ad campaign began, and found that 27 of them
00
showed a purchase of the pretzels. Another simple random sample of 72 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 90% 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 90% confident that the difference between the proportions of customers purchasing
pretzels before and after the ad campaign is
<P1 - P2
<]:
Skip Part
Check
Save For Later
Submit Assignment](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F231fae22-ac62-4382-9eb0-95d912af77d1%2F7b1e6168-a701-4a0f-bf8b-bd64c01636db%2Fqlsk8ai_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 92 convenience store receipts the week before the ad campaign began, and found that 27 of them
00
showed a purchase of the pretzels. Another simple random sample of 72 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 90% 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 90% confident that the difference between the proportions of customers purchasing
pretzels before and after the ad campaign is
<P1 - P2
<]:
Skip Part
Check
Save For Later
Submit Assignment
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