问题
单项选择题
Given Cov (X,Y) = 1000000. What does this indicate about the relationship between X and Y（）
A. It is p and positive.
B. It is weak and positive.
C. Only that it is positive.
答案
参考答案：C
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.