Test: Test 2: Chap 4, 5, 6.1-6.2 13E Question 14 The lengths of pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days, a. Find the probability of a preg Find the length that separates premature babies from those who are not premature. Click to view page 1 of the table. Click to view page 2 of the table a. The probability that a pregnancy will last 309 days or longer is (Round to four decimal places as needed.) b. Babies who are born on or before days are considered premature (Round to the nearest integer as needed )