If the line segments in an interaction plot are parallel, then the plot indicates that the two factors interact with each other.

Question

Quizplus · Accepted Answer

If the line segments in an interaction plot are parallel, it indicates that there is no interaction between the two factors. An interaction occurs when the effect of one factor on the response variable depends on the level of the other factor. Parallel lines suggest that the effect of one factor is consistent across all levels of the other factor, and there is no interaction taking place.

If the Line Segments in an Interaction Plot Are Parallel