In an interaction model, the relationship between $E ( y )$ and $x _ { 1 }$ is linear for each fixed value of $x _ { 2 }$ but the slopes of the lines relating $E ( y )$ and $x _ { 1 }$ may be different for two different fixed values of $x _ { 2 }$.

Question

Quizplus · Accepted Answer

In an interaction model, the effect of $x_1$ on $E(y)$ depends on the level of $x_2$, allowing for different slopes for different values of $x_2$.

In an Interaction Model, the Relationship Between E(y)E ( y )E(y)

In an Interaction Model, the Relationship Between $E ( y )$