IBM Water System SPSS COMPLEX SAMPLES 19 Manuel d'utilisateur Page 70

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Chapter 10
By default, the Complex Samples Logistic Regression procedure makes the highest-valued
category the reference category. This dialog box allows you to specify the highest value, the
lowest value, or a custom category as the reference category.
Complex Samples Logistic Regression Model
Figure 10-3
Logistic Regression Model dialog box
Specify Model Effects. By default, the procedure builds a main-effects model using the factors
and covariates specied in the m ain dialog box. Alternatively, you can build a custom model that
includes interaction effects and nested terms.
Non-Nested Terms
For the selected factors and covariates:
Interaction. Creates the highest-level interaction term for all selected variables.
Main effects. Creates a main-effects term for each variable selected.
All 2-way. Creates all possible two-way interactions of the selected variables.
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