Question
Suppose a retailer claims that the average wait time for a customer on its support line is 179 seconds. A random sample of 57 customers
Suppose a retailer claims that the average wait time for a customer on its support line is 179 seconds. A random sample of 57 customers had an average wait time of 169 seconds. Assume the population standard deviation for wait time is 51 seconds. Using a 95% confidenceinterval, does this sample support theretailer's claim?
Using a 95% confidenceinterval, does this sample support theretailer's claim?
A.Yes, because theretailer's claim is between the lower limit of seconds and the upper limit of seconds for the mean wait time.
B.No, because theretailer's claim is not between the lower limit of seconds and the upper limit of seconds for the mean wait time.
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