what is the probability of obtaining a sample mean greater than m 5 60 for a random sample of n 5 16 scores selected from a normal population with a mean of m 5 65 and a standard deviation of s 5 20?what is the probability of obtaining a sample mean greater than m 5 60 for a random sample of n 5 16 scores selected from a normal population with a mean of m 5 65 and a standard deviation of s 5 20?