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A) According to the National Institute of Health, 34% of adults in the United States are...

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Statistics

A) According to the National Institute of Health, 34% of adultsin the United States are overweight. Suppose we sample 20 adults.Let X denote the number of overweight people among them.

What is the probability that more than 6 of the adults will beoverweight? Round to four decimal places.

B) According to the National Institute of Health, 34% of adultsin the United States are overweight. Suppose we sample 20 adults.Let X denote the number of overweight people among them.

What is the probability that exactly 5 of the adults will beoverweight? Round to four decimal places.

C) The weight of infants at a New York hospital has a mean of7.5 pounds and a standard deviation of 0.95 pounds. Weights areapproximately normally distributed.

What is the probability that a randomly selected infant willhave a weight between 6.8 pounds and 7.9 pounds? Round to fourdecimal places.

D) The lengths of pregnancies are normally distributed with amean of 248 days and a standard deviation of 15 days. If a pregnantwoman is randomly selected, what is the probability that herpregnancy lasts more than 275 days? Round to four decimalplaces.

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