Use Main Effects Plot to see how one or two categorical factors are related to the continuous response.
For example, a carpet manufacturer wants to see the results for a one-way ANOVA. The manufacturer creates a main effect plot of the average carpet durability scores by carpet type.
Where to find this analysis
When to use an alternate plot
This plot displays data means. After you perform a two-way ANOVA, you can use Factorial Plots to create main effects plots and interaction plots that have fitted means instead of data means.
For more information, go to Comparison of data means and fitted Means.