An interaction between X₁ and X₂ is present in which of the following situations? A) The relationship between GPA (Y) and the time spent on watching TV (X₁) is similar for students with different SAT scores (X₂). B) The relationship between GPA (Y) and the time spent on watching TV (X₁) is different for students with higher SAT scores versus those with lower SAT scores (X₂). C) There is a strong correlation between the time spent on watching TV (X₁) and SAT scores (X₂). D) There is a strong correlation between GPA (Y) and the time spent on watching TV (X₁) controlling for SAT scores (X₂).

Question

Quizplus · Accepted Answer

An interaction between two variables (in this case, X₁ and X₂) implies that the effect of one variable on the outcome (GPA, Y) depends on the level of the other variable. Choice B describes a situation where the relationship between GPA and time spent on watching TV changes based on SAT scores, indicating an interaction.

An Interaction Between X1 and X2 Is Present in Which

An Interaction Between X₁ and X₂ Is Present in Which