assignment7

Estimated regression coefficients for y term coef se

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Unformatted text preview: 0.004 Residual 0.023 -0.022 St Resid 3.14 R -2.92 R R denotes an observation with a large standardized residual. Estimated Regression Coefficients for Replicates using data in uncoded units Term Constant A B A*A A*B Coef 1.10728 -0.0439614 -0.0323629 0.0177910 0.0193347 Regression model: y = �0 + �1x1 + �2x2 + �11x12 + �11x12 + �12x1x2 = 1.10728 -0.0439614x1 -0.0323629x2 + 0.0177910x12 + 0.0193347x1x2 Nor mal Pr obabil ity Plot (response is Replicates) 99 95 90 Percent 80 70 60 50 40 30 20 10 5 1 -0.02 -0.01 0.00 Residual 0.01 0.02 0.03 Ver sus Fi ts (response is Replicates) 0.03 Residual 0.02 0.01 0.00 -0.01 -0.02 1.050 1.075 1.100 1.125 1.150 Fitted Value 1.175 Both plots do not show much improvement from the previous plots. Using transformation 1/y: From Minitab: Response Surface Regression: Replicates versus A, B The following terms cannot be estimated, and were removed. B*B The analysis was done using coded units. Estimated Regression Coefficients for Replicates Term Constant A B A*A A*B Coef 9.81930 3.06367 2.01027 0.27219 0.02012 S = 0.286823 R-Sq = 99.39% SE Coef 0.12827 0.06414...
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