The number of hours of reserve capacity of 10 randomly selected automotive batteries is shown to the right.

1.741.861.541.691.78

1 .951.351.541.492.01

Assume the sample is taken from a normally distributed population. Construct 95% confidence intervals for(a) the population variance 2and(b) the population standard deviation .

A, the confidence interval for the population variance is

B, Calculate the confidence interval for the population standarddeviation, rounding to three decimal places.