Statistic
posted by Theresa on .
Heights of adult men have a mean of 69.0 inches and a standard deviation of 2.8 inches. Approximately what percentage of adult men have a height between 66.2 and 77.4 inches? Must show the number and the empirical rule

You have to find z scores first.
66.269.0 then divide by 2.8
77.4  69.0 then divide by 2.8
Now, you have to find the area between those two z scores. The empirical rule tells you the % between 3 and 3 standard deviations, between 2 and 2 sds and between 1 and 1 standard deviations. 
rgty