An unhappy post office customer is frustrated with the waiting time to buy stamps. Upon registering his
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An unhappy post office customer is frustrated with the waiting time to buy stamps. Upon registering his complaint, he was told, “The average waiting time in the past has been about 4 minutes with a standard deviation of 2 minutes.” The customer collected a sample of n 45 customers and found the mean wait was 5.3 minutes. Find the 95% confidence interval for the mean waiting time.
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Related Book For
Just The Essentials Of Elementary Statistics
ISBN: 9780495314875
10th Edition
Authors: Robert Johnson, Patricia Kuby
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