Perfect correlation means all of the following except
A) r = -1 or r = +1.
B) all points on the scatterplot lie on a straight line.
C) all variation in one variable is explained by variation in the other variable.
D) there is a causal relationship between the variables.
E) each variable is a perfect predictor of the other.

Question

Quizplus · Accepted Answer

Perfect correlation only implies a strong linear relationship between variables, but it does not necessarily imply a causal relationship between them.

Perfect Correlation Means All of the Following Except