SOLUTION: Suppose that The lengths of pregnancies are normally distributed with a mean of 271 days and a standard deviation of 10 days. how do I find the percentage of pregnancies that are l
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Question 1193653: Suppose that The lengths of pregnancies are normally distributed with a mean of 271 days and a standard deviation of 10 days. how do I find the percentage of pregnancies that are longer than 254 days? for my immediate computations used for or more decimal places give my final answer to two decimal places. Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! z=(x-mean)/sd
>(254-271)/10
or >-1.7
=0.9554 or 0.96
This makes sense, because from -2 sd rightward, the probability is about 97.5%. This isn't quite as much to the left as -2 sd but close.
