Three machines produce the same part. Ten different machine operators work these machines. A quality team wants to determine whether the machines are producing parts that are significantly different from each other in weight. The team devises an experimental design in which a random part is selected from each of the 10 machine operators on each machine. The results follow.

Using alpha of .05, test to determine whether there is a difference inmachines.

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Operator Machine Machine 2 Machine 3 231 233 229 232 235 234 236 230 228 237 229 232 233 235 228 237 233 229 230 238 234 231 230 231 232 231 230 227 229 234 7 10