Question: 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

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 24 factorial experiment is used, with the defining contrast being ABCD. The data are presented here. Perform an analysis of variance on main effects only. Use α = 0.05.

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