Modeling and Multivariate Methods - SAS

Chapter 20 Performing Discriminant Analysis 503
Validation
Show Group Means shows or hides a table with the means of each variable. Means are shown for each level
and for all levels of the X variable. Figure 20.11 shows the Group Means table for this example.
Figure 20.11 Group Means Table
Validation
Validation is the process of using part of a data set to build a model, and using the other part to assess the
predictive ability of the model.
• The training set is the part that estimates model parameters.
• The validation set is the part that validates the predictive ability of the model.
Excluded rows are not included in the training set. When the Show Classification Counts option is chosen
on the platform red-triangle menu, results are given for both training and validation (excluded) data. This
helps you assess if the discriminant function has any predictive ability on data that was not used to build the
function.
In the Discriminant Scores report, there is an indicator for excluded rows.