SOLUTION: According to the Centers for Disease Control and Prevention, he total blood cholesterol levels in Americans are found to be normally distributed with a mean of 200 mg/dl and a st

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Question 1010532:
According to the Centers for Disease Control and Prevention, he total blood cholesterol levels in Americans are found to be normally distributed with a mean of 200 mg/dl and a standard deviation of 18 mg/dl. Determine the percentage of the population who have blood cholesterol levels less than 210 mg/dl. (Round to four decimal places.)
Answer by stanbon(75887) About Me  (Show Source):
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According to the Centers for Disease Control and Prevention, he total blood cholesterol levels in Americans are found to be normally distributed with a mean of 200 mg/dl and a standard deviation of 18 mg/dl. Determine the percentage of the population who have blood cholesterol levels less than 210 mg/dl. (Round to four decimal places.)
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z(210) = (210-200)/18 = -0.5556
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P(x < 210) = P(z < -0.5556) = normalcdf(-100,-0.5556) = 0.2892
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Cheers,
Stan H.
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