SOLUTION: Use the standard normal table to determine the probability. The distribution of cholesterol levels in teenage boys is approximately normal, with µ = 170 and σ = 30. Levels abo

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Question 869862: Use the standard normal table to determine the probability. The distribution of cholesterol levels in teenage boys is approximately normal, with µ = 170 and σ = 30. Levels above 200 warrant attention. If 95 teenage boys are examined, how many would you expect to have cholesterol levels greater than 225?


Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 µ = 170 and σ = 30
P(x > 225): z = (225-170)/(30/sqrt(95)) = 55/3.0779= 17.869
P(z > 17.869 ) = ~0
basically NO teenage boy would be expected to have cholesterol levels greater than 225