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the length of pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. using the empirical rule for

the length of pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. using the empirical rule for normal distribution. what percentage of pregnancy length would be Between 253 and 283 days what pregnancy length would account for approximately 95% of pregnancies??

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