We are investigating the relationship among three variables. We have graphed two of them. Suppose that the variable that is not measured on the x-axis or the y-axis changes. Then, there is
A) an omitted variable.
B) a violation of the absence of trend assumption.
C) a shift in the plotted curve.
D) a movement along the plotted curve.
E) no impact on the plotted curve because the variable is not measured on either of the axes.

Question

Quizplus · Accepted Answer

When a third variable (not measured on the x- or y-axis) changes and affects the relationship between the two variables being graphed, it can cause a shift in the plotted curve. This is because the third variable might influence the underlying relationship, leading to different outcomes that are reflected as a shift in the curve.

We Are Investigating the Relationship Among Three Variables