A manufacturing company designed a factorial experiment to determine whether the number of defective parts produced by two machines differed and if the number of defective parts produced also depended on whether the raw material needed by each machine was loaded manually or by an automatic feed system. The following data give the numbers of defective parts produced. Use α = .05 to test for any significant effect due to machine, loading system, and interaction.

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Loading System Manual Automatic 30 26 24 28 30 34 Machine1 20 Machine 2