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The weight of male babies less than 2 months old in the United States is normally...

The weight of male babies less than 2 months old in the United States is normally distributed with mean 11.8 pounds and standard deviation 2.6 pounds.

(a) What proportion of babies weigh more than 15 pounds?

(b) What porportion of babies weigh less than 12 pounds?

(c) What proportion of babies weigh between 11 and 15 pounds?

(d) Is it unusual for a baby to weigh more than 17 pounds? Round answers to four decimal places.

Math   Statistics-And-Probability   
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