Six different machines are being considered for use in manufacturing rubber seals. The machines are being compared with respect, to tensile strength of the product. A random sample of 4 seals from each machine is used to determine whether the mean tensile strength varies from machine to machine. The following are the tensile-strength measurements in kilograms per square centimeter x 10-1. Perform the analysis of variance at the 0.05 level of significance and indicate whether or not the mean tensile strengths differ significantly for the 6machines.

Machine 6. 20.3 14.6 18.3 17.5 16.9 16.4 17.5 19.2 15.7 16.7 16.2 19.2 17.8 17.7 15.4 15.8 20.8 16.5 17.5 20.1 18.9 20.5 18.G 18.9