Two variables, X and Y, have a strong linear correlation. Under what conditions can you determine the direction of causality just from knowing the correlation coefficient?
A)When the correlation is negative
B)When the correlation is positive
C)When there is high power
D)None of the above

Question

Quizplus · Accepted Answer

The correlation coefficient, whether positive or negative, only measures the strength and direction of a linear relationship between two variables. It does not imply causation or the direction of causality. High power relates to the probability of detecting an effect if there is one, but also does not determine causality direction.

Two Variables, X and Y, Have a Strong Linear Correlation