A food inspector examining 5 jars of a certain brand of peanutbutter obtained th

A food inspector examining 5 jars of a certain brand of peanutbutter obtained the following percentages of impurities: 2.3 1.92.1 2.8 2.3 (5) Find a 99% confidence interval for the varianceof the percentages of impurities in this brand of peanutbutter.