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Among coffee drinkers, men drink a mean of 3.8 cups per day with a SD of 0.7 cups. Assume the number of cups per day

Among coffee drinkers, men drink a mean of 3.8 cups per day with a SD of 0.7 cups. Assume the number of cups per day follow a normal distribution.

d. If. a sample of 30 men is selected, what is the 90th percentile of the mean number of cups per day?

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