This is an Interaction Plot showing the mean years of survival after treatment f

Question

This is an Interaction Plot showing the mean years of survival after treatment for lung cancer, with treatment levels 1 and 2 among men and women. In the plot, 'Score" refers to the mean years of survival. Choose the best interpretation of effects. One main effect and one interaction effect One main effect and no interaction effect No main effects and no interaction effect Two main effects and no interaction effect Two main effects and one interaction effect No main effects and one interaction effect

Explanation / Answer

Since the two lines intersect, the best interpretation of effects is as follows

TWO MAIN EFFECTS AND ONE INTERACTION EFFECT

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