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1. The total cholesterol levels of a sample of men aged 35-44 are normally distributed with a mean of 206 milligrams per deciliter and a standard deviation of 38.9 milligrams per deciliter.

a) What percent of the men have a total cholesterol level less than 215 milligrams per deciliter of blood?

b) If 241 men in the 35-44 age group are randomly selected, about how many would you expect to have a total cholesterol level greater than 268 milligrams per deciliter of blood?

(Round to two decimal places.)

2. Use the normal distribution of fish lengths for which the mean is 9 inches and the standard deviation is 2 inches. Assume the variable x is normally distributed.

a) What percent of the fish are longer than 11 inches?

b) If 200 fish are randomly selected, about how many would you expect to be shorter than 6 inches?

(Round to two decimal places.)

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Statistics and Probability, Statistics

Category:- Statistics and Probability
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