Posted by **ryee** on Sunday, April 24, 2011 at 6:56pm.

the birth of healthy, full term infants in the United States is nearly normally distributed. The mean weight is 3,500 grams, and the standard deeviation is 500 grams.

(a) what percentage of the healthy newborns will weigh more than 3,250 grams?

(b) what weightswould 95% of all healthy newborns tend to fall between?

(c)what is the z score for an infant who weighs 2,750 grams?

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