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Pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. a. What is the probability that a pregnancy lasts 300 days or longer? a. Traditionally, the gestational period is considered to be 40 weeks. What percentage of babies complete the full gestational period? That is, what percentage of pregnancies last 40 weeks or more? b. Dr. Sutton delivers approximately 90 babies a year. How many full gestational period pregnancies (pregnancy lasting 40 weeks or more) can Dr. Sutton expect in a year? c. If premature babies are those born from the lowest 8% of pregnancy lengths, what is the length of a that: ature births from themes ofthe wool ?
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