The lengths of pregnancies in a small rural village are normally distributed with a mean of 269 days and a standard deviation of 15 days. In what range would you expect to find the middle 50% of most...

The lengths of pregnancies in a small rural village are normally distributed with a mean of 269 days and a standard deviation of 15 days.


In what range would you expect to find the middle 50% of most pregnancies?
Between  and .


If you were to draw samples of size 56 from this population, in what range would you expect to find the middle 50% of most averages for the lengths of pregnancies in the sample?
Between ______  and _______.