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Complex Samples General Linear Model
Figure 19-3
Model dialog box
EChoose to build a Custom model.
ESelect Maineffects as the type of term to build and select shopfor and usecoup as model terms.
ESelect Interactionas the type of term to buildand add the shopfor*usecoup interaction as a model
term.
EClick Continue.
EClick Statistics in the General Linear Model dialog box.