Among coffee drinkers, men drink a mean of 3.2 cups per day with a standard deviation of 0.8 cups. Assume the number of drinking per day follows a normal distribution.

a. What proportion drink 2 cups per day or more?

b. What proportion drink no more than 4 cups per day?

c. If the top 5% of coffee drinkers are considered heavy coffee drinkers, what is the minimum number of cups consumed by a heavy coffee drinker?

d. If a sample of 20 men is selected, what is the probability that the mean number of cups per day is greater than 3?

1. A recent study of cardiovascular risk factors reported that 30% of adults meet criteria for hypertension. If 15 adults are assessed, what is the probability that

a. Exactly 5 meet the criteria for hypertension?

b. None meet the criteria for hypertension

c. How many would you expect to meet the criteria for hypertension?