which relationship can best described as casual?

Question

(1)height and intelligence
(2)shoe size and running speed
(3)number of correct answers on a test and test score
(4)number of students in a class and number of students with brown hair

Answer 1

casual, or causal? Big Difference.

My experience is that the number of correct answers is causal for the final score.

Answer 2

http://www.answers.com/causal

http://www.answers.com/casual

Yes, indeed ... BIG difference!