Recall the GLM Univariate dialog box.

Click Model.

Select Full factorial as the model type

Click Continue.

Click Options in the GLM Univariate dialog box.

Select Descriptive statistics, Homogeneity tests, Spread vs. level plot, and Parameter estimates in the Display group.

Click Continue.

Click OK in the GLM Univariate dialog box.

These selections produce an analysis of covariance to assess the effect of program participation, controlling for salary before entering the program.