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Confidence interval Standard deviation of birth weights

What is the 95% confidence interval for the standard deviation of birth weights at County General Hospital, if the standard deviation of the last 25 babies born there was 1.1 pounds.

a. 0.7 < o < 2.3
b. 0.9 < o < 1.5
c. 0.8 < o < 2.1
d. 0.8 < o < 1.9

Solution Summary

The solution gives step by step procedure for the 95% confidence interval for the standard deviation of birth weights.

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