The total cholesterol levels of a sample of men aged normally distributed with a

Question

The total cholesterol levels of a sample of men aged normally distributed with a mean of210 per decider and a standard deviation of milligrams per decider What percent of the 35-44 are milligrams What percent of the mon have a total cholesterol level less than 235 milligrams per deciliter of blood? 246 men in the 35-44 age group are randomly selected, about how many would you to have a total cholesterol level greater than 262 milligrams per deciliter of blood? The percent of the men that have a total cholesterol level loss than 235 milligrams per declare of blood is (Round to two decimal places as needed) a) of the 246 men selected, would be expected to have a total level greater than 262 milligrams per defiler blood Round to the cholesterol of nearest integer as needed) Enter your answer in each of the answer boxes Ask me anything

Explanation / Answer

Mean = 210 mg per decilitre

standard deviation sd = 38.5 mg per decilitre

a) P(X) = P(Z at (X-M)/sd)

s0, P(235) = P(Z = (235-210)/38.5)

= P(Z=0.65) (from normal distribution table)

= 0.7422

b) P(greater than 262) = 1 - P((262-210)/38.5)

= 1 - P(1.35)

= 1 - 0.9115 = 0.0885

No of people having cholestrol greater than 262, from a sample of 246 = 246x0.0885 = 21.77 = 22

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