A master's student is conducting a study of depression in college age men using the test described above which has that = 70 and = 25. She is planning on collecting data from 40 men.

4a) What are the characteristics of the sampling distribution of the mean for the depression assessment in #3 for n = 40? 4b) What is the probability of obtaining a mean less than 65 for a sample of 40 from this population?