Suppose that the heights of female adults in the US are normally distributed with a mean (µ) of 65.4 inches and a standard deviation (σ) of 2.8 inches. Let X denote the height of a randomly chosen adult female. Find the probability that X is between 66 and 70 inches:

Answer 1

Just enter the values into Dave Lane's excellent page
http://davidmlane.com/normal.html

enter the mean and sd
click on between and enter 66 and 70 to get

.365