Estimates, Pseudo-Components in Mixture Experiments
Both the Quick tab and the ANOVA/Effects tab of the Analysis of a Mixture Experiment dialog box contain a Summary: Estimates, pseudo-components button. Click this button to produce a spreadsheet with parameter (coefficient) estimates for the current model, based on the transformed pseudo-components. The effects that will be computed depend on the current model, as specified via the options in the Model group box on the Model tab.
All estimates in this spreadsheet pertain to the rescaled factor settings, that is, to pseudo-components. To see the results for the original (untransformed) factor settings, click the Estimates, original comps button on the Quick tab or the ANOVA/Effects tab. Note that if your original components were already scaled to the standard 0-1 range (and the mixture total is equal to 1.0), the Estimates, original comps button is dimmed, and the results shown for this option are identical to those for the original components (because the pseudo-component transformation will not change the factor values in that case; see the formula below).
x'i = (xi -Li )/(Total-L)
Here, x'i stands for the i'th pseudo-component, xi stands for the original component value, Li stands for the lower constraint (limit) for the i'th component, L stands for the sum of all lower constraints (limits) for all components in the design, and Total stands for the mixture total. This transformation makes the coefficients for different factors comparable in size. Also, since this is a linear transformation of the variables, the conclusions from the experiment will not be affected.