In Myers and Montgomery (2002) a scenario is discussed in which an auto bumper plating process is described. The response is the thickness of the material. Factors that may impact the thickness include amount of nickel (A) and pH (B). A two factor experiment is designed. The plan is a completely randomized design in which the individual bumpers are assigned randomly to the factor combinations. Three levels of pH and two levels of nickel content are involved in the experiment, follows: The thickness in cm x 10-3 data are as follows:(a) Display the analysis of variance table with tests for both main effects and interaction. Show P-values.(b) Give engineering conclusions. What have you learned from the analysis of this data?(c) Show a plot that depicts either a presence or absence ofinteraction.

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Nickel Content PH 6. (grams) 5.5 18 250 211 221 195 172 150 188 165 170 115 165 142 88 112 69 10 101 72 108