单选题 Given Cov (X,Y) = 1000000. What does this indicate about the relationship between X and Y?

A、

A. It is strong and positive.
B、

B. It is weak and positive.
C、

C. Only that it is positive.

【正确答案】 C

【答案解析】A positive covariance indicates a positive linear relationship but nothing else. The magnitude of the covariance by itself is not informative with respect to the strength of the relationship.