Specify model options for Best Subsets Regression

In the Best Subsets Regression dialog box, specify the size of the model to fit and select whether to include the intercept in the model.
Fit intercept

Select Fit intercept to include the intercept (also called the constant) in the regression model. In most cases, you should include the constant in the model.

A possible reason to remove the constant is when you can assume that the response is 0 when the predictor values equal 0. For example, consider a model that predicts calories based on the fat, protein, and carbohydrate contents of a food. When the fat, protein, and carbohydrates are 0, the number of calories will also be 0 (or very close to 0).

When you choose not include the constant, Minitab does not display the R2 statistics. Use S instead of the R2 statistics to evaluate the fit of models.

Models of each size to display
Enter a number from 1 to 5. For example, if you choose 3, Minitab displays goodness-of-fit statistics for the 3 models of each size that have the highest R2 values.
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