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Plots

Central Composite Designs: Plots

The following plot types are available for central composite designs:

Effects plots allow you to visually evaluate the effects of factors and factorial interactions on the selected response.

Residuals are the differences between the observed response values and the response values predicted by the model at each combination of factorial values. Residuals plots, which are available only when there is error in the design, help to determine the validity of the model for the currently selected response. All residuals plots allow the user to select the type of residual to be used:

The plots are described next.

* These plots are available only when there is error in the design, indicated by a positive value for sum of squares for Residual in the ANOVA table of the analysis results.

 

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