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.

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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