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The total cholesterol levels of a sample of men aged​ 35-44 are normally distributed with a...

The total cholesterol levels of a sample of men aged​ 35-44 are normally distributed with a mean of 220 milligrams per deciliter and a standard deviation of 38.2 milligrams per deciliter. ​(a) What percent of the men have a total cholesterol level less than 210 milligrams per deciliter of​ blood? ​(b) If 251 men in the​ 35-44 age group are randomly​ selected, about how many would you expect to have a total cholesterol level greater than 256 milligrams per deciliter of​ blood?

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Answer #1

Flom the gfven data Ihe total cholesteiol of a men - x Giiven mean u- «ao Standard devicdíon 35日 38-a 223 38.2 38-a oAY (om z table) :39.74 38.1 38.2 - I- 0.la6 (from 2 table) 0-1736 for asi men, Exped valu« - 43.5136

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