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Newborn babies: A study conducted by the Center for Population Economics at the University of Chicago...

Newborn babies: A study conducted by the Center for Population Economics at the University of Chicago studied the birth weights of 752 babies born in New York. The mean weight was 3088 grams with a standard deviation of 884 grams. Assume that birth weight data are approximately bell-shaped. Estimate the number of newborns who weighed between 1320 grams and 4856 grams. Round to the nearest whole number.

The number of newborns who weighed between 1320 grams and 4856 grams is .
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Answer #1

P[1320<X<4856]

=P[-2<Z<2]

=0.9772-0.0228.....................by using Z table.

=0.9544

Therefore, 752*0.9544 =717.71

The number of newborns who weighed between 1320 grams and 4856 grams is approximately =718
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