SOLUTION: The distribution of cholesterol levels in teenage boys is approximately normal with mu/mean= 170 and standard deviation = 30. (Source: U.S. National Center for Health Statistics)

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Question 1039817: The distribution of cholesterol levels in teenage boys is approximately normal with mu/mean= 170 and standard deviation = 30.
(Source: U.S. National Center for Health Statistics). Levels above 200 warrant attention.
Find the probability that a teenage boy has a cholesterol level greater than 200.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Find the z score,
z=%28x-mu%29%2Fsigma=%28200-170%29%2F30=30%2F30=1
P%28z=1%29=0.8413
So the probability of greater than 200 would be,
P=1-0.8413
P=0.1587