2208-MATH-1308-501-ELEM STATISTICAL ANALYSIS Homework: 7.2 Applications of the Normal Distribution Score: 0 of 1 pt 16 of 20 (17 complete) 7.2.41 The lengths of a particular animal's pregnancies are approximately normally distributed, with mean u = 269 days and standard deviation o = 8 days (a) What proportion of pregnancies lasts more than 279 days? (b) What proportion of pregnancies lasts between 267 and 275 days? (c) What is the probability that a randomly selected pregnancy lasts no more than 257 days? (d) A "very preterm" baby is one whose gestation period is less than 249 days. Are very preterm babies unusual? Click the icon to view a table of areas under the normal curve. (a) The proportion of pregnancies that last more than 279 days is (Round to four decimal places as needed.)