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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?% confidence?interval, does this sample support the? retailer's claim?
Using a 95?% confidence? interval, does this sample support the? retailer's claim?
A. Yes?, because the? retailer's claim is between the lower limit of seconds and the upper limit of seconds for the mean wait time.
B. No?, because the? retailer'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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