Question: 15.17 Consider Figure 15.14, which represents a 22 factorial with 3 center runs. If quadratic curvature is significant, what additional design points would you select

15.17 Consider Figure 15.14, which represents a 22 factorial with 3 center runs. If quadratic curvature is significant, what additional design points would you select that might allow the estimation of the terms x21

, x22

? Explain.


x2 -1,1 -1,-1 (0, 0) X1 1,1 1,-1

x2 -1,1 -1,-1 (0, 0) X1 1,1 1,-1

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