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OpenStudy (anonymous):
Assume that the mean length of a human pregnancy is 268 days with a standard deviation of 9 days. What percentage of human pregnancies do we expect to last no more than 260 days?
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OpenStudy (anonymous):
P ( x ≥ 260 ) = ( 260 - 268 ) / 9 = .88 Refer this result from the graph to obtain its probability Then 1 - Prob = ... %
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