It is suspected that a supplier systematically underfills a certain brand of detergent canisters. A small sample of n 15 canisters is measured exactly. This shows that the canisters contain on average...

Extracted text: It is suspected that a supplier systematically underfills a certain brand of detergent canisters. A small sample of n 15 canisters is measured exactly. This shows that the canisters contain on average X = 4947.2 ml and the sample standard deviation S = 31.6 ml. a. Determine an 80% confidence interval for the average contents of a canister. Give your answers to two decimal places. i. The lower confidence bound is: ii. The upper confidence bound is: b. What is the smallest sample size n necessary to obtain an interval width of 22 for a confidence level of 98%? Round your answer up to the nearest whole number.