2. Which of the following accurately describes an interaction between two variables? a. The effect of one variable depends on the levels of the second variable. b. Both variables are equally influenced by a third factor. c. The two variables are differentially affected by a third variable. d. Both variables produce a change in the subjects' scores. 3. The results from a two-factor analysis of variance show that both main effects are significant. From this information, what can you conclude about the interaction? a. The interaction also must be significant. b. The interaction cannot be significant. c. There must be an interaction but it may not be statistically significant. d. You can make no conclusions about the significance of the interaction