Model Browser User's Guide

Stepwise Regression Techniques

You can open the stepwise regression window through the  toolbar icon, when in the global level view (that is, with a response feature selected in the model tree). The Stepwise tool provides a number of methods of selecting the model terms that should be included.

Minimizing Predicted Error Sum of Squares (PRESS) is a good method for working toward a regression model that provides good predictive capability over the experimental factor space.

The use of PRESS is a key indicator of the predictive quality of a model. The predicted error uses predictions calculated without using the observed value for that observation. PRESS is known as Delete 1 statistics in the Statistics Toolbox. See also Linear Model Statistics Displays.

Univariate Model Building Process Overview

Stepwise Table