Suppose a retailer claims that the average wait time for a customer on its support line is 170 seconds. A random sample of 51 customers had an average wait time of 161 seconds. Assume the population standard deviation for wait time is 50 seconds. Using a 95% confidence interval, does this sample support the retailer's claim? Using a 95% confidence interval, does this sample support the retailer's claim? Select the correct choice below, and fill in the answer boxes to complete your choice. (Round to two decimal places as needed.) A. Yes, because the retailer's claim is between the lower limit of for the mean wait time. B. No, because the retailer's claim is not between the lower limit of for the mean wait time. seconds and the upper limit of seconds and the upper limit of seconds seconds

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Question

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Suppose a retailer claims that the average wait time for a customer on its support line is 170 seconds. A random sample
of 51 customers had an average wait time of 161 seconds. Assume the population standard deviation for wait time is 50
seconds. Using a 95% confidence interval, does this sample support the retailer's claim?
Using a 95% confidence interval, does this sample support the retailer's claim? Select the correct choice below, and fill
in the answer boxes to complete your choice.
(Round to two decimal places as needed.)
A. Yes, because the retailer's claim is between the lower limit of
for the mean wait time.
B. No, because the retailer's claim is not between the lower limit of
for the mean wait time.
seconds and the upper limit of
seconds and the upper limit of
seconds
seconds
Transcribed Image Text:Suppose a retailer claims that the average wait time for a customer on its support line is 170 seconds. A random sample of 51 customers had an average wait time of 161 seconds. Assume the population standard deviation for wait time is 50 seconds. Using a 95% confidence interval, does this sample support the retailer's claim? Using a 95% confidence interval, does this sample support the retailer's claim? Select the correct choice below, and fill in the answer boxes to complete your choice. (Round to two decimal places as needed.) A. Yes, because the retailer's claim is between the lower limit of for the mean wait time. B. No, because the retailer's claim is not between the lower limit of for the mean wait time. seconds and the upper limit of seconds and the upper limit of seconds seconds
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