Data - Factorial Plots
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To create factorial plots, you must:

·    create a mixture design with process variables

·    enter the response data in your worksheet (for main effects and interactions plots)

For cube plots, you do not need to have response data, but you must create a mixture design first. If you enter a response column, Minitab displays the means for the raw response data at each point in the cube where observations were measured. If you do not enter a response column, Minitab draws points on the cube for the effects that are in your model.