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.