Suppose the heights of 18-year-old men are approximately normally distributed, with mean 73 inches and standard deviation 4 inches.
What is the probability that an 18-year-old man selected at random is between 72 and 74 inches tall? (Round to four decimal places.)
If a random sample of twenty-nine 18-year-old men is selected, what is the probability that the mean height x is between 72 and 74 inches? (Round to four decimal places.)