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A major department store chain is interested in estimating the mean amount its credit card customers spent on their first visit to the chain's new store in the mall Fifteen credit card accounts wore randomly sampled and analyzed with the following results Xbar - S5o 50 and S- 20. Assuming the distribution of the amount spent on their first visit is normal what is the shape of the sampling distribution of the sample mean that will be used to create the desired confidence interval for u? O a) Approximately normal with a mean of $50 50 O bA standard normal distribution O CIAI distribution with 15 degrees of freedom Od Atdistribution with 14 degrees of freedom

A major department store chain is interested in estimating the mean amount its credit card customers spent on their first visit to the chain's new store in the mall Fifteen credit card accounts wore randomly sampled and analyzed with the following results Xbar - S5o 50 and S- 20. Assuming the distribution of the amount spent on their first visit is normal what is the shape of the sampling distribution of the sample mean that will be used to create the desired confidence interval for u? O a) Approximately normal with a mean of $50 50 O bA standard normal distribution O CIAI distribution with 15 degrees of freedom Od Atdistribution with 14 degrees of freedom

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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A major department store chain is interested in estimating the mean amount its credit card customers spent on their first visit to the chain's new store in the mall. Fifteen credit card accounts were randomly sampled and analyzed with the following results: X_bar = $50.50 and S = 20. Assuming the distribution of the amount spent on their first visit is normal what is the shape of the sampling distribution of the sample mean that will be used to create the desired confidence interval for u? O a) Approximately normal with a mean of $50.50 O b) A standard normal distribution O c) At distribution with 15 degrees of freedom O d) At distribution with 14 degrees of freedom
Transcribed Image Text:A major department store chain is interested in estimating the mean amount its credit card customers spent on their first visit to the chain's new store in the mall. Fifteen credit card accounts were randomly sampled and analyzed with the following results: X_bar = $50.50 and S = 20. Assuming the distribution of the amount spent on their first visit is normal what is the shape of the sampling distribution of the sample mean that will be used to create the desired confidence interval for u? O a) Approximately normal with a mean of $50.50 O b) A standard normal distribution O c) At distribution with 15 degrees of freedom O d) At distribution with 14 degrees of freedom
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