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4 September, 06:40

The lengths of pregnancies are normally distributed with a mean of 266 days and a standard deviation of 15 days.

a. find the probability of a pregnancy lasting 308 days or longer.

b. if the length of pregnancy is in the lowest 2 %, then the baby is premature. find the length that separates premature babies from those who are not premature.

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  1. 4 September, 08:59
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    a. The probability a pregnancy will last 308 days or longer is approximately 0.26%

    b. A baby will be considered premature if the pregnancy lasts 235 days or less.
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