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What is the probability that her pregnancy will last

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The length of human pregnancies from conception to birth approximates a normal distribution with a mean of 266 days and a standard deviation of 16 days. Round all answers to 4 decimal places.

a) One pregnant woman is selected randomly. What is the probability that her pregnancy will last between 242 and 271 days (roughly between 8 and 9 months)?

b) One pregnant woman is selected randomly. What is the probability that her pregnancy will last more than 264 days?

c) One pregnant woman is selected randomly. What is the probability that her pregnancy will last less than 250 days?

d) What would be the minimum length of pregnancy in days that will put a woman in the top 10% of pregnancy time?

Reference no: EM132857013

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