Model Summary

Figure 1. Model summary table
Model summary table

The model summary table indicates that only three of the selected independent variables made a significant enough contribution to be included in the final model: income, age, and education. This is important information to know if you want to apply this model to other data files, since the independent variables used in the model must be present in any data file to which you want to apply the model.

The summary table also indicates that the tree model itself is probably not a particularly simple one since it has 29 nodes and 15 terminal nodes. This may not be an issue if you want a reliable model that can be applied in a practical fashion rather than a simple model that is easy to describe or explain. Of course, for practical purposes, you probably also want a model that doesn't rely on too many independent (predictor) variables. In this case, that's not a problem since only three independent variables are included in the final model.

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