International bottled water association


The International Bottled Water Association says that Americans on average drink 4.6 (8-oz.) servings of water day. Suppose that the number of 8-oz. servings of water is approximately normally distributed with standard deviation of 1.7 servings. (Provide your answers correct to four decimal places.)

(a) What proportion of Americans drink more than the recommended 8 servings?

(b) What proportion of Americans drink less than half the recommended 8 servings?

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Basic Statistics: International bottled water association
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