Eat your cereal: Boxes of cereal are labeled as containing 16 ounces. Following are the weights of a sample of 12 boxes. Assume the population is normally distributed. 16.05 16.01 16.06 16.09 16.15 16.08 15.99 16.12 16.02 15.98 16.03 16.15 Send data to Excel Part 1 of 3 (a) Find the sample standard deviation. Round the answer to at least four decimal places. The sample standard deviations is 0.0584 Part: 1/3 Part 2 of 3 (b) Construct a 90% confidence interval for the population standard deviation a. Round the answers to at least two decimal places A 90% confidence interval for the population standard deviation is