When a post-facto relationship is found between two variables A and B, it is always possible, though not certain, that
A) A caused B
B) B caused A
C) a third variable, X, has caused A plus B
D) all of these

Question

Quizplus · Accepted Answer

When a post-facto relationship is found between two variables A and B, it is always possible that A caused B, B caused A, or a third variable X has caused A plus B. Therefore, the best choice is D - all of these. It is important to further investigate and analyze the relationship between the variables to determine the most likely causality.

When a Post-Facto Relationship Is Found Between Two Variables a and B