The lengths of a particular animal's pregnancies are approximately normally distributed, with meanu= 264 days and standard deviation a = 16 days. (a) What proportion of pregnancies lasts more than 292 days? (b) What proportion of pregnancies lasts between 256 and 272 days? (c) What is the probability that a randomly selected pregnancy lasts no more than 240 days? (d) A "very preterm" baby is one whose gestation period is less than 228 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 292 days is

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