assignment7

612 x2x3 4625 4992 0926 0378 constant s 141209 press

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Unformatted text preview: ��������������������� � � ��������������� � Response Surface Regression: y versus x1, x2, z The analysis was done using coded units. Estimated Regression Coefficients for y Term Coef SE Coef T P Constant 87.361 1.541 56.675 0.000 x1 9.801 1.767 5.548 0.000 x2 2.289 1.767 1.296 0.227 z -6.125 x1*x1 -13.760 3.019 -4.558 0.001 x2*x2 -21.760 3.019 -7.208 0.000 x1*x2 8.132 x1*z -4.415 2.308 -1.912 0.088 x2*z -7.778 2.308 -3.370 0.008 1.373 -4.462 0.002 3.882 2.095 0.066 … Analysis of Variance for y Source Regression DF Seq SS Adj SS Adj MS F P 8 2034.86 2034.86 254.357 16.88 0.000 Linear 3 789.28 789.28 263.092 17.46 0.000 Square 2 953.20 953.20 476.602 31.62 0.000 Interaction Residual Error 3 9 292.38 292.38 135.64 135.64 97.458 15.072 Lack-of-Fit 4 90.31 90.31 22.578 Pure Error 5 45.33 45.33 9.067 Total … � 17 2170.50 6.47 0.013 2.49 0.172 Residual P lots f or y N o r m a l Pr o b a b ilit y Pl o t o f t he Re si d...
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