Assume that women’s heights are normally distributed with a mean of 63.6inches and a standard deviation of 2.5inches. If 90 women are randomly selected, find the probability that they have a mean height between 62.9inches and 64.0inches.

Answer 1

You'd need your graphing calculator for this
Go to "distr" and click "normalcdf("

Type this in ⤵︎
lower: 62.9
upper: 64
µ: 63.6
σ: 2.5

Click "Paste" and you'll get your answer

Answer 2

A nice online Z-table gui can be found at

http://davidmlane.com/hyperstat/z_table.html