tores decided to raise the price of a certain brand of toaster in 20 andomly selected stores (Sample A) and to lower the price in 10 andomly selected stores (Sample B). Monthly revenue (number sales x ales price) from these toasters was recorded for each of the 30 stores. Results from the two samples are as follows: No. of stores Mean Std. Dev. Sample A Sample B $842 $817 $217 $202 20 10 a) If you considered these to be independent samples, what would be the pooled estimate of the standard deviation for revenue? (q the two means. Calculate a 95% confidence interval for the difference between

tores decided to raise the price of a certain brand of toaster in 20 andomly selected stores (Sample A) and to lower the price in 10 andomly selected stores (Sample B). Monthly revenue (number sales x ales price) from these toasters was recorded for each of the 30 stores. Results from the two samples are as follows: No. of stores Mean Std. Dev. Sample A Sample B $842 $817 $217 $202 20 10 a) If you considered these to be independent samples, what would be the pooled estimate of the standard deviation for revenue? (q the two means. Calculate a 95% confidence interval for the difference between

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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