The Lengths of Pregnancies Are Normally Distributed with a Mean

Multiple Choice

The lengths of pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. If 64 women are randomly selected, find the probability that they have a mean pregnancy between 266
Days and 268 days.

A) 0.3577
B) 0.7881
C) 0.2881
D) 0.5517