# Question

The following frequency distribution represents the birth weight of all babies born in the United States in 2004. Approximate the mean and standard deviation birth weight.

Weight (grams) .... Number of Babies (thousands)

0-999 ........ 30

1000-1999 ...... 97

2000-2999 ....... 935

3000-3999 ....... 2698

4000-4999 ....... 344

5000-5999 ....... 5

Weight (grams) .... Number of Babies (thousands)

0-999 ........ 30

1000-1999 ...... 97

2000-2999 ....... 935

3000-3999 ....... 2698

4000-4999 ....... 344

5000-5999 ....... 5

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