Question
Serum cholesterol is important risk factor for coronary disease suppose that serum cholesterol is approximately normally distributed with mean 214.7mg/dl and standard deviation 46.89mg/dl. a.
Serum cholesterol is important risk factor for coronary disease suppose that serum cholesterol is approximately normally distributed with mean 214.7mg/dl and standard deviation 46.89mg/dl.
a. cholesterol levels in the top 19% are classified as high enough to warrant risk for heart disease what cholesterol level corresponds to this cut-off z score? and cholesterol level ? answer z score in 2 decimal places.
B. suppose cholesterol levels in the bottom 38% are classified normal. what cholesterol levels corresponds to a normal reading z score ? and cholesterol ?
c. between what two values do the middle 26% of cholesterol reading fail? z=+- ? and between ? and ?
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