When the cell means of a factorial design are presented as a line graph, a nonsignificant interaction is indicated by
A) parallel lines
B) crossed lines
C) converging lines
D) any of the descriptive alternatives are correct.

Question

Quizplus · Accepted Answer

Parallel lines in a line graph representing the cell means of a factorial design indicate that the interaction between the factors is not significant. This means that the effect of one factor on the outcome variable is consistent across the levels of the other factor.

When the Cell Means of a Factorial Design Are Presented