QUESTION 3 Exercise 13.12 Bigger animals tend to carry their young longer before birth. The length of horse pregnancies from conception to birth varies according to a roughly Normal distribution with mean 336 days and standard deviation 3 days. Use the 68-95-99.7 rule to answer the following questions. The lengths of the middle 95% of all horse pregnancies fall between and % of horse pregnancies are less than 333 days