A national study showed that annual salaries for entry-level clerical jobs are normally distributed with a mean of $37,000 and a standard deviation of $5,780. Find the probability that a randomly selected individual in a clerical job will have a salary less than $40,000. (Round your final answer to four decimal places.)

b

Assume that men's heights are normally distributed with a mean of 68.6 inches and a standard deviation of 3.6 inches. If 37 men are randomly selected, find the probability their sample average height will be greater than 69.4 inches. (Round your final answer to four decimal places.)