Final answer:
When we control for a third variable, we place the name of the control variable in the column box.
Step-by-step explanation:
When we control for a third variable, we place the name of the control variable in the column box.
In statistical analysis, controlling for a third variable involves examining the relationship between two variables while holding another variable constant or taking it into account.
For example, if we are studying the relationship between hours spent studying and exam scores, and we want to control for the effect of sleep, we would enter the name of the control variable 'sleep' in the column box.