The blood cholesterol level of all men aged 20 to 34 follows the Normal distribution with mean 188 mg/dl and standard deviation 41 mg/dI.
A. What is the 80th percentile of the distribution of blood cholesterol levels?
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B. What is the probability that exactly 3 out of 7 randomly selected men aged 20 to 34 will have a blood cholesterol level that is greater than the level calculated in part (A)?
C. What is the probability that a randomly selected sample of 7 men in the study will have a mean blood cholesterol level of at least 200 mg/dl?
