Question

Assume that the heights of men are normally distributed with a mean of 69.9 inches and a standard deviation of 3.2 inches. The top 1% of the heights of the men will be selected for a
chance to try out for a pro basketball team. What is the minimum height needed to be selected to the team?

Out of 180 randomly selected adults in the United States who were surveyed, 74 exercise on a regular basis. Construct a 98% confidence interval for the proportion of all
adults in the United States.

The numbers of advertisements seen or heard in one week for 20 randomly selected people in the United States are listed below. Construct a 95% confidence interval for the true mean
number of advertisements seen or heard in one week.

598 494 441 595 728 690 684 486 735 808
481 298 135 846 764 317 649 732 582 677

If X is a normal random variable with mean 9.8, and P(x > 8.7) = .9364, then what
is the standard deviation of X?

Answer 1