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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?

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Please only round final answer. Round final answer to 2 decimal places. 

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?
Transcribed Image Text: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?
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