When a production process is operating correctly, the number of units produced per hour has a normal

Question:

When a production process is operating correctly, the number of units produced per hour has a normal with a mean of 92.0 and a standard deviation of 3.6. A random sample of 4 different hours was taken.
a. Find the mean of the sampling of the sample means.
b. Find the variance of the sampling of the sample mean.
c. Find the standard error of the sampling of the sample mean.
d. What is the probability that the sample mean exceeds 93.0 units? 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...