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What proportion of pregnancies last more than 308 days

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The lengths of a particular animal's prenancies are approximately normally distributed, with mean u=280 days, and standard deviation 16days

(A). What proportion of pregnancies last more than 308 days

(B). What proportion of pregnancies last between 256 and 284 days?

(C). What is the probability that a randomly selected pregnancy lasts no more than 252 days?

(D). A "Very Preterm" baby is one whose gestation period is less than 240 days. Are very preterm babies unusual?

Reference no: EM132488274

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