Develop a 95 confidence interval estimate for the


Babies weighing less than 5.5 pounds at birth are considered "low-birth-weight babies." In the United States, 7.6% of newborns are low-birth-weight babies. The following information was accumulated from samples of new births taken from two counties.

Hamilton Shelby

150 200

Sample size

Number of "low-birth-weight babies" 18 22

Develop a 95% confidence interval estimate for the difference between the proportions of low-birth-weight babies in the two counties. 

Is there conclusive evidence that one of the proportions is significantly different from the other

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Basic Computer Science: Develop a 95 confidence interval estimate for the
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