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OpenStudy (anonymous):
The heights of a large sample of pine trees are normally distributed with a mean of 40 feet and standard deviation of 7 ft. What percent of the trees are shorter than 54 ft?
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OpenStudy (anonymous):
you just want answers, will be back shortly
OpenStudy (dumbcow):
P(Z<2) = 0.9772 look up in Z table 54 is 2 std deviations away from mean
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