2. A milk company has four machines that fill gallon jugs with milk. The quality control manager is interested in determining whether the average fill for these machines is the same. The following data represent random samples of fill measures (in quarts) for 19 jugs of milk filled by the different machines. Machine 1 Machine 2 Machine 3 Machine 4 4.05 3.99 3.97 4 4.01 4.02 3.98 4.02 4.02 4.01 3.97 3.99 4.04 3.99 3.95 4.01 4 4 4 a) Use Alpha=0.01 to test the hypotheses b) Use the Tukey-Kramer procedure to know which pairs of machines, if any, produce significantly different mean fills. c) Discuss the business implications of your findings.