posted by Emily .
The distribution of heights of adult American men is approximately normal with mean 69 inches and standard deviation 2.5 inches. Use the 68-95-99.7 rule to answer the following questions:
(d) A height of 71.5 inches corresponds to what percentile of adult male American heights?
==> I already know the answer is the 84th percentile, but how do you get this answer?
Z = (score-mean)/SD
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to that Z score.