A sample is selected from a population with a mean of m 5 65 and a standard deviation of s 5 15. a. If the sample has n 5 9 scores, what is the expected value of M and the standard error of M? b. If...

A sample is selected from a population with a mean of m 5 65 and a standard deviation of s 5 15.

a. If the sample has n 5 9 scores, what is the expected value of M and the standard error of M?

b. If the sample has n 5 25 scores, what is the expected value of M and the standard error of M?