Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with a mean of 207 and a standard deviation of 17 days.
A. What is the probability that a randomly selected pregnancy lasts less than 201 days?
B. What is the probability that a random sample of 16 pregnancies has a mean gestation period of 201 days or less?
C. What is the probability that a random sample of 37 pregnancies has a mean gestation period of 201 days or less?