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Total cholesterol in children ages 10-15 yrs of age is assumed to folow a normal distribution with a mean 191 and a standard deviation of 22.4

A.) What proportion of children 10 to 15 have a total cholesterol between 180 and 190?
B.) What proportion of children 10 to 15 would be classified as hyperlipidemic (assume that hyperlipidemia is defined as a total cholesterol lelvel of 200)?
C.) What is the 90th percentile of total cholesterol?

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