suppose average pizza delivery times are normally distributed with unknown population mean and population standard deviation...

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Statistics

suppose average pizza delivery times are normally distributedwith unknown population mean and population standard deviation of6. A random sample of 28 pizza delivery restaurants is taken andhas a sample mean of delivery time of 36 minutes. Show yourwork.

A. find critical value of 99% confidence level

b. sketch graph

c. what distribution should you use for this problem

d. calculate error bound

e. lower endpoint

upper endpoint

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