Specifying and Testing Specific Models
The logic of specifying models in Statistica is as follows:
- Refer to factors in the table by their respective numbers.
- Use those numbers in order to specify main effects and interactions. For example, in order to specify a model with no interactions but only main effects for each of three factors, enter 1 2 3 (separated by spaces or commas).
- In order to specify a model with a 2-way interaction between factors 1 and 3, and the main effect for factor 2, enter 1 3 2 (or 2 3 1; the order does not matter).
- Higher-order interactions are specified analogously (for example, 124 134 15).
After exiting the dialog via OK, Statistica will begin to estimate the model.
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