Mean Line and Interaction Charts

Two-Way Interaction Chart (Stacked Means Line Plot)

  • This chart represents a graphical display of the effects of one factor across levels of another factor.
  • With no or insignificant interaction, the mean lines are approximately parallel. The more the lines deviate from being parallel, the more significant the interaction effect.
Example Graph

A Two-Way Interaction Chart and the Corresponding Two-Way ANOVA Test Report

Two-Way Mean line Chart

Two-Way Interaction