You are a sales manager for a grocery store, and you want to see if the introduction of a new sales promotion will increase the sales in your store. To do so, you decided to create an experiment by giving a small sample of customers the promotion before expanding it to a larger customer base. You gave 12 people the promotion, and also observed the sales of 17 people who did not get the promotion as a control group. You found those who received the promotion to have an average monthly sales of $454.81, with a sample standard deviation of $46.79. You found those who did not receive the promotion had an average monthly sales of $387.23, with a sample standard deviation of $70.06. Suppose you want to create a confidence interval for promotion no promotion. What is the standard error of the difference between sample averages in your analysis?

You are a sales manager for a grocery store, and you want to see if the introduction of a new sales promotion will increase the sales in your store. To do so, you decided to create an experiment by giving a small sample of customers the promotion before expanding it to a larger customer base. You gave 12 people the promotion, and also observed the sales of 17 people who did not get the promotion as a control group. You found those who received the promotion to have an average monthly sales of $454.81, with a sample standard deviation of $46.79. You found those who did not receive the promotion had an average monthly sales of $387.23, with a sample standard deviation of $70.06. Suppose you want to create a confidence interval for promotion no promotion. What is the standard error of the difference between sample averages in your analysis?

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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