Do you have enough good cholesterol?” High density lipoprotein (HDL) is sometimes called the “good cholesterol” because high values are associated with a reduced risk of heart disease. According to the American Heart Association, people over the age of 20 years should have at least 40 milligrams per deciliter (mg/dl) of HDL cholesterol. U.S. women aged 20 and over have a mean HDL of 55 mg/dl with a standard deviation of 15.5 mg/dl. Assume that the distribution is normal. A. What percent of women have low values of HDL (40 mg/dl or less?) B. HDL levels of 60mg/dl or higher are believed to protect people from heart disease. What percent of women have protective levels of HDL? C. Women with more than 40mg/dl but less than 60 mg/dl of HDL are in the intermediate range, neither very good or very bad. What proportion are in this category?
Do you have enough good cholesterol?” High density lipoprotein (HDL) is sometimes called the “good cholesterol” because high values are associated with a reduced risk of heart disease. According to the American Heart Association, people over the age of 20 years should have at least 40 milligrams per deciliter (mg/dl) of HDL cholesterol. U.S. women aged 20 and over have a mean HDL of 55 mg/dl with a standard deviation of 15.5 mg/dl. Assume that the distribution is normal.
A. What percent of women have low values of HDL (40 mg/dl or less?)
B. HDL levels of 60mg/dl or higher are believed to protect people from heart disease. What percent of women have protective levels of HDL?
C. Women with more than 40mg/dl but less than 60 mg/dl of HDL are in the intermediate
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