step  Recall the GLM Univariate dialog box.

step  Click Model.

step  Select Full factorial as the model type

step  Click Continue.

step  Click Options in the GLM Univariate dialog box.

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

step  Click Continue.

step  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.