To specify the response surface model terms
main topic     see also 

1    In the Analyze Response Surface Design dialog box, click Terms.

2    Do one of the following:

·    from Include the following terms, choose linear, linear + squares,
linear + interactions, or full quadratic

·    move the terms you do not want to include in the model from Selected Terms to Available Terms using the arrow buttons

-    to move one or more factors, highlight the desired terms then click or

-    to move all of the terms, click or

You can also move a term by double-clicking it. Click OK.

3    If you would like Minitab to use the terms that you specified in Terms as candidates and choose a good model based on them, click Auto Fit.

4    In Method, change the drop-down list from None to the stepwise regression procedure that you want.

5    If you like, use one or more of the available dialog box options, then click OK.