Question

I KNOW THE ANSWER BUT NEED A STEP BY STEP EXPLANATION.

A quality control supervisor is concerned about the variance of fill per bottle. Regulatory agencies specify that the standard deviation of the amount of fill should be less than 0.5 ounce. To determine whether the process is meeting this specification, the supervisor randomly selects 15 bottles, weighs the contents of each, and finds that the sample standard deviation of these measurements is 0.7. Compute a 99% confidence interval for the standard deviation of ounces of fill for the bottling plant.

a) UL: 1.297, LL: 0.468        b) UL: 1.491 LL: 0.2091

            c) UL: 1.213, LL: 0.4852        d) UL: 1.683, LL: 0.2190

Answer 1