The display below summarizes the results of analyzing a 24 factorial design. Term Intercept Effect Estimate Sum

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The display below summarizes the results of analyzing a 24 factorial design.

Term Intercept Effect Estimate Sum of Squares %Contribution A 6.25 3.25945 B 5.25 110.25 57.4967 C 3.5 49 25.5541 D 0.75 1.1734 AB 0.75 2.25 1.1734 AC –0.5 1 0.521512 AD 0.75 2.25 1.1734 BC 1.5 9 BD 0.25 0.25 0.130378 CD 0.5 1 0.521512 ABC –1 4 2.08605 ABD 2.25 1.1734 ACD –0.5 0.521512 BCD 0 0 0 ABCD –0.5 1

(a) Fill in the missing information in this table.

(b) Construct a normal probability plot of the effects. Which factors seem to be active?

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