Checking Homogeneity of the Covariate Coefficients

  1. To run a GLM Univariate analysis, from the menus choose:

    Analyze > General Linear Model > Univariate...

    Figure 1. GLM Univariate dialog box
    GLM Univariate dialog box
  2. Click Reset to restore the default settings.
  3. Select Income after the program as the dependent variable.
  4. Select Program status as the fixed factor.
  5. Select Income before the program as the covariate.
  6. Click Model.
    Figure 2. Model dialog box
    Model dialog box
  7. Select Custom as the model type.
  8. Select prog and incbef in the Factors and Covariates list.
  9. Select Main effects from the Build Term(s) drop-down list and select the main effects to the model.
  10. Select prog and incbef in the Factors and Covariates list.
  11. Select Interaction from the Build Term(s) drop-down list and select the interaction term to the model.
  12. Click Continue.
  13. Click Options in the GLM Univariate dialog box.
    Figure 3. Options dialog box
    Options dialog box
  14. Select Estimates of effect size in the Display group.
  15. Click Continue.
  16. Click OK in the GLM Univariate dialog box.

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