The lengths of pregnancies are normally distributed with a mean of 273 days and a standard deviation of 20 days. if 64 women are randomly selected, find the probability that they have a mean pregnancy between 273 days and 275 days.
The lengths of pregnancies are normally distributed with a mean of 273 days and a standard deviation of 20 days. if 64 women are randomly selected, find the probability that they have a mean pregnancy between 273 days and 275 days.
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