A zookeeper is interested in the lengths of pregnancies of mammals. The gestation periods (in days) of 12 randomly selected mammal species are listed below.
260 42 16 350 280 230 337 113 68 44 13 62
a. Find the mean gestation period for the sample.
b. Find the median gestation period for the sample.
c. Find the standard deviation of the given sample gestation periods.
d. What is the range of the sample gestation periods?
e. If one gestation period is randomly selected from this sample, find the probability that it is at least 50 days.
f. If two gestation periods are randomly selected from this sample, find the probability that they are both at least 50 days.