2. The distribution of the length of human pregnancies is approximately Normal with a mean of 266 days and a standard deviation of 16 days. In Parts (a), (b), and (c) please use Minitab to draw a picture to illustrate your answer and paste the picture below your answer.

(a) What percentage of pregnancies last less than 259 days?

(b) What percentage of pregnancies last between 260 and 270 days?

(a)According to the Normal model, what percentage of pregnancies last longer than 10 months (approximately 304 days)?

(b)Why does your answer in Part (c) probably overstate the true percentage of pregnancies that last longer than 10 months?

(e) What is the interquartile range of the length of human pregnancies?