Students of a large university spend an average of $5 a day on lunch. The standard deviation

Question:

Students of a large university spend an average of $5 a day on lunch. The standard deviation of the expenditure is $3. A simple random sample of 36 students is taken.
a. What are the expected value, standard deviation, and shape of the sampling of the sample mean?
b. What is the probability that the sample mean will be at least $4?
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...