Electronic copiers make copies by gluing black ink on paper, using static electricity. Heating and gluing the ink on the paper comprise the final stage of the copying process. The gluing power during this final process determines the quality of the copy. It is postulated that temperature, surface state of gluing the roller, and hardness of the press roller influence the gluing power of the copier. An experiment is run with treatments consisting of a combination of these three factors at each of three levels. The following data show the gluing power for each treatment combination. Perform an analysis of variance with ? = 0.05 to test for significant main and interaction effects.

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Surface State of Hardness of the Gluing Press Roller Roller 20 40 60 0.52 0.44 |0.54 0.52 0.60 0.55 0.57 0.53 0.65 0.56 0.78 0.68 Medium: 0.64 0.59 0.79 0.73 0.49 0.48 0.58 0.64 0.79 0.78 0.74 0.50 0.67 0.77 0.58 0.68 0.55 0.65 0.74 0.65 0.57 0.59 0.57 0.58 0.46 0.40 |0.31 0.49 |0.56 0.42 0.58 0.37 0.48s 0.66 0.49 049 Medium: 0.60 0.43 0.66 0.57 0.64 0.54 0.62 0.61 0.72 0.56 0.74 0.56 0.53 0.65 0.53 0.45 0.56 0.66 0.66 0.56 0.59 0.47 0.71 0.67 0.52 0.44 0.54 0.52 0.65 0.49 0.57 0.53 0.65 0.56 0.65 0.52 Medium: 0.53 0.65 0.53 0.45 0.49 0.48 0.66 0.56 0.59 0.47 0.74 0.50 0.43 0.43 0.48 (131 0.55 0.65 0.47 0.44 0.43 0.27 0.57 0.58 Soft: Low Temp. Hard:- Medium Soft: Temp. Hard: High Temp. Soft: Hard: