Question
The lengths of a particular animal's pregnancies are approximately normally distributed, with mean muμequals=256256 days and...
The lengths of a particular animal's pregnancies are approximately normally distributed, with mean
muμequals=256256
days and standard deviation
sigmaσequals=1212
days.(a) What proportion of pregnancies lasts more than
259259
days?(b) What proportion of pregnancies lasts between
241241
and
262262
days?(c) What is the probability that a randomly selected pregnancy lasts no more than
238238
days?(d) A "very preterm" baby is one whose gestation period is less than
226226
days. Are very preterm babies unusual?
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(a) The proportion of pregnancies that last more than
259259
days is
nothing.
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