Now you are going to do some calculations for the delivery times for each week using the

Question:

Now you are going to do some calculations for the delivery times for each week using the mean delivery time which is 23 minutes and the standard deviation which was 20 minutes.
(a) Describe the sampling of, the sample mean delivery time for a random sample of 120 deliveries.
Is the sampling normally distributed? Explain.
Calculate and for the sampling of the sample mean when the sample size is 120. (Round 4 decimals if needed)
(b) What is the probability that the mean delivery time for a random sample of 120 deliveries is less than 30 minutes? Round 4 decimals.
(c) What is the probability that a random sample of 120 deliveries has a mean delivery time greater than 30 minutes? Round 4 decimals.
Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...