The lengths of pregnancies are normally distributed

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January 3rd, 2018

The lengths of pregnancies are normally distributed with mean µ = 268 days and standard deviation ? = 15 days.Use this information to do the next problem.1. (a) If one pregnant woman is chosen at random, find the probability that her length of pregnancy is between 260 and 278 days.(b) Find the number of days above which lie the longest 1.5% of all pregnancies.Show your work.

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