Modeling and Multivariate Methods - SAS

Chapter 3 Fitting Standard Least Squares Models 73
Estimates
Figure 3.13 Inverse Prediction Dialog for a Multiple Regression Model
6. Type the values for Oxy, as shown in Figure 3.13.
7. Delete the value for Runtime, because you want to predict that value.
8. Click OK.
Figure 3.14 Inverse Prediction for a Multiple Regression Model
Cox Mixtures
Note: This option is available only for mixture models.
In mixture designs, the model parameters cannot easily be used to judge the effects of the mixture
components. The Cox Mixture model (a reparameterized and constrained version of the Scheffé model)
produces parameter estimates. You can then derive factor effects and the response surface shape relative to a
reference point in the design space. See Cornell (1990) for a complete discussion.