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A study conducted by the Center for Population Economics at the University of Chicago studied the birth weights of 1000 babies born in New York.

A study conducted by the Center for Population Economics at the University of Chicago studied the birth weights of 1000 babies born in New York. The mean weight was 3234 grams with a standard deviation of 871 grams. Assume that the shape of birth weight data distribution is unimodal and symmetric. Find the approximate percentage of newborns who weighted less than 4105 grams. Find the nearest

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