statistics
posted by Maddie Liguori .
The distribution of the heights of men in the U.S. is normally distributed with a mean of 70 inches and a standard deviation of 5 inches.
a) What is the probability of an american male being less than 60 inches tall?
b) What is the probability of an american male being between 68 and 72 inches tall?

Z = (scoremean)/SD
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions related to the Z scores.