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

Algebra ->  Probability-and-statistics -> SOLUTION: The distribution of cholesterol levels in teenage boys is approximately normal with μ = 170 and σ = 30 (Source: U.S. National Center for Health Statistics)      Log On


   

Question 1137037: The distribution of cholesterol levels in teenage boys is approximately normal with μ = 170 and σ = 30 (Source: U.S. National Center for Health Statistics).  What percent of teenage boys have levels between 170 and 225? 
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
z=(x-mean)/sd
so z is between 0 and 55/30 or 1.83
that probability is 0.4664