Running the Analysis

  1. To run a Complex Samples General Linear Model analysis, from the menus choose:

    Analyze > Complex Samples > General Linear Model...

    Figure 1. Complex Samples Plan dialog box
    Complex Samples Plan dialog box
  2. In the Complex Samples Plan dialog, browse to and select grocery.csplan. See the topic Sample Files for more information.
  3. Click Continue.
    Figure 2. General Linear Model dialog box
    General Linear Model dialog box
  4. Select Amount spent as the dependent variable.
  5. Select Who shopping for and Use coupons as factors.
  6. Click Model.
    Figure 3. Model dialog box
    Model dialog box
  7. In the Model dialog, choose to build a Custom model.
  8. Select Main effects as the type of term to build and select shopfor and usecoup as model terms.
  9. Select Interaction as the type of term to build and add the shopfor*usecoup interaction as a model term.
  10. Click Continue.
  11. Click Statistics in the General Linear Model dialog box.
    Figure 4. General Linear Model Statistics dialog box
    General Linear Model Statistics dialog box
  12. In the Statistics dialog, select Estimate, Standard error, Confidence interval, and Design effect in the Model Parameters group.
  13. Click Continue.
  14. Click Estimated Means in the General Linear Model dialog box.
    Figure 5. General Linear Model Estimated Means dialog box
    General Linear Model Estimated Means dialog box
  15. Choose to display means for shopfor, usecoup, and the shopfor*usecoup interaction.
  16. Select a Simple contrast and 3 Self and family as the reference category for shopfor. Note that, once selected, the category appears as "3" in the dialog box.
  17. Select a Simple contrast and 1 No as the reference category for usecoup.
  18. Click Continue.
  19. Click OK in the General Linear Model dialog box.

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