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The lengths of pregnancies are normally distributed with a mean of 273 days and a standard deviation of 20 days. If 64 women ar...Asked by Niki
The length of pregnancies are normally distributed with a mean of 273 days in the standard deviation the 15 days. If 36 women are randomly selected find the probability that they have a mean pregnancy between 273 days in 275 day
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Damon
http://davidmlane.com/hyperstat/z_table.html