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10. If the duration of a human pregnancy is approximately normal with a mean of 266 days and a standard deviation of 16 days. (a)

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10. If the duration of a human pregnancy is approximately normal with a mean of 266 days and a standard deviation of 16 days. (a) What is the probability of randomly selecting a woman and her pregnancy lasts less than 277 days? Round to the nearest day. (b) At least how many days should the longest 25% of all pregnancies last? (c) Suppose a certain obstetrician is currently providing care to 10 pregnant women. What is the probability that these women will have a combined pregnancy length greater than 2,730 days

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