![]() Unless you have completely balanced cell sizes (and thus have an orthogonal design with respect to every combination of factors) running an analysis in Fit Model with all your potential factors (as others have suggested here) will give a different result from the "main effects" plot I believe you're looking for (due to adjustments in the Least Sq Means).įit Y by X will always "ignore" the levels of other factors when calculating means and plotting the results of one factor. Those plots represent "main effects" because they're the average effects of each variable on the response ignoring (statistically) other variables. ![]() ![]() As I understand it, what Minitab calls its "Main effects plot" is really a line graph of your response paneled by different predictors.
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