Each multiple comparison test begins with a comparison circles plot, which is a visual representation of group mean comparisons. Visual Comparison of Group Means shows the comparison circles for the All Pairs, Tukey HSD method. Other comparison tests lengthen or shorten the radii of the circles.
Visual Comparison of Group Means
Angles of Intersection and Significance
Highlighting Comparison Circles
Related Information 

Help created on 9/19/2017