Assignment 20 test review
i sixsigma
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Test Review
The lengths of pregnancies are normally distributed with a mean of 269 days and a standard deviation of 15 days.
a. In a letter to an advice column, a wife claimed to have given birth 308 days after a brief visit from her husband, who was working in another country. Find the probability of a pregnancy lasting 308 days or longer. What does the result suggest?
b. If the length of pregnancy is in the lowest 4%, then the baby is premature. Find the length that separates premature babies from those who are not considered premature.