An experiment is conducted so that, an engineer can gain insight into the influence of sealing temperature A, cooling bar temperature B, percent polyethylene additive C, and pressure D on the seal strength (in grams per inch) of a. bread-wrapper Stock. A 1/2 fraction of a 2'1 factorial experiment is used with the defining contrast being ABCD. The data are: presented here. Perform an analysis of variance on main effects and two-factor interactions, assuming that all three-factor and higher interactions are negligible. Use a =0.05.

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D Response - 1 6.6 6.9 7.9 6.1 9.2 6.8 10.4 - 1 1 - 1 - 1 1- - 1 7.3