The wear index of a metal that is used to make engine blocks is measured under experimental conditions. The wear is affected by the length of time the metal is under stress, the temperature of the metal, and the percentage of the alloy in the metal. Low values of the index indicate little wear. A full 3³

factorial experiment was performed in three replicates to investigate the effect of the three factors on wear. The factors and their levels are  The data below show the responses over the three replicates:  Write a report of your analysis of the responses and the conclusions of this experiment.

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Temperature (C) Time (h) Alloy (%) 145 4 24 160 4 47 175 6 10