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The lengths of a particular​ animal's pregnancies are approximately normally​ distributed, with mean muequals264 days and...

The lengths of a particular​ animal's pregnancies are approximately normally​ distributed, with mean muequals264 days and standard deviation sigmaequals8 days. ​(a) What ​(c) What is the probability that a randomly selected pregnancy lasts no more than 260 ​days? ​(d) A​ "very preterm" baby is one whose gestation period is less than 244 days. Are very preterm babies​ unusual?

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