A study conducted by the Center for Population Economics at the University of Chicago studied the birth weights of  671 babies born in New York. The mean weight was 3364 grams with a standard deviation of 896  grams. Assume that birth weight data are approximately bell-shaped. a) Estimate the number of newborns whose weight was less than  4260 grams. b) Estimate the number of newborns whose weight was greater than 1572 grams. (c) Estimate the number of newborns whose weight was between  3364 and 5156 grams.

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