Suppose a retailer claims that the average wait time for a customer on its support line is 185 seconds. A random sample of 53 customers had an average wait time of 177 seconds. Assume the population standard deviation for wait time is 53 seconds. Using a 95% confidence interval, does this sample support the retailers claim? A) Yes, because the retailers claim is beteeen the lower limit of __ seconds and the upper limit of __ seconds for the mean wait time. B) No, because the retailers claim is not between the lower limit of __ seconds and the upper limit of __ seconds for the mean wait time.
Suppose a retailer claims that the average wait time for a customer on its support line is 185 seconds. A random sample of 53 customers had an average wait time of 177 seconds. Assume the population standard deviation for wait time is 53 seconds. Using a 95% confidence interval, does this sample support the retailers claim? A) Yes, because the retailers claim is beteeen the lower limit of __ seconds and the upper limit of __ seconds for the mean wait time. B) No, because the retailers claim is not between the lower limit of __ seconds and the upper limit of __ seconds for the mean wait time.
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.2: Expected Value And Variance Of Continuous Random Variables
Problem 10E
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Suppose a retailer claims that the average wait time for a customer on its support line is 185 seconds. A random sample of 53 customers had an average wait time of 177 seconds. Assume the population standard deviation for wait time is 53 seconds. Using a 95% confidence interval, does this sample support the retailers claim?
A) Yes, because the retailers claim is beteeen the lower limit of __ seconds and the upper limit of __ seconds for the
B) No, because the retailers claim is not between the lower limit of __ seconds and the upper limit of __ seconds for the mean wait time.
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