Suppose the heights of 18-year-old men are approximatelynormally distributed, with mean 72 inches and standarddeviation 6 inches.
(a) What is the probability that an 18-year-old man selected atrandom is between 71 and 73 inches tall? (Round your answer to fourdecimal places.)
(b) If a random sample of eleven 18-year-old men is selected, whatis the probability that the mean height x is between 71and 73 inches? (Round your answer to four decimal places.)
