9. An engineer at a casting company performed an experiment to determine which factor (quenching temperature, alloy
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9. An engineer at a casting company performed an experiment to determine which factor (quenching temperature, alloy content, or machine tool speed) had the largest effect on the surface roughness. The following table gives the levels for each factor in the experiment.
Using a one-factor-at-a-time experiment, determine which factor has the most effect on surface roughness if the responses are y0 = 1.10 m in, yA = 1.20 m in, yB = 0.80 m in, and yc = 1.60 m in.
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