For a causal relationship to exist there must be evidence
A)of a relationship between variables.
B)that one variable precedes the other in time.
C)that a third variable did not cause the changes observed in the first two variables.
D)all of these.

Question

Quizplus · Accepted Answer

For a causal relationship to exist, there must be evidence of a relationship between variables, that one variable precedes the other in time, and that a third variable did not cause the changes observed in the first two variables. Therefore, all three options must be considered to establish a causal relationship.

For a Causal Relationship to Exist There Must Be Evidence