11.

The lengths of pregnancies in a small rural village are normally distributed with: M = 270 0 = 15 In what range would you expect to find the middle 68% of most pregnancies? Between and If you were to draw samples of size 45 from this population, in what range would you expect to find the middle 68% of most averages for the lengths of pregnancies in the sample? Between and round to 1 decimal place