When dealing with population means,if the lines in a graph are _____,this suggests the presence of an interaction.
A)not parallel
B)parallel
C)curvilinear
D)none of these

Question

Quizplus · Accepted Answer

If the lines in a graph of population means are not parallel, it suggests the presence of an interaction. Parallel lines indicate that there is no interaction between the different groups being compared, while non-parallel lines suggest that the effect of one variable on the outcome varies depending on the level of the other variable. Curvilinear lines may indicate a non-linear relationship between the variables, but not necessarily an interaction. None of these cannot be the correct answer as the question specifically asks about the lines in a graph of population means.

When Dealing with Population Means,if the Lines in a Graph