Specifying terms to test
main topic 

In the Results subdialog box, you can specify model terms in Custom multivariate test for the following terms and designate the error term in Error. Minitab will perform four multivariate tests (see MANOVA tests) for those terms. This option is most useful when you have factors that you consider as random factors. Model terms that are random or that are interactions with random terms may need a different error term than general MANOVA supplies. You can determine the appropriate error term by entering one response variable with General Linear Model, choose to display the expected mean square, and determine which error term was used for each model terms.

If you specify an error term, it must be a single term that is in the model. This error term is used for all requested tests. If you have different error terms for certain model terms, enter each separately and exercise the general MANOVA dialog for each one. If you do not specify an error term, Minitab uses MSE.