两变量为正相关,则

A、∑(X-[img=~/QImg/2013-10-14-10-46-38/image011.jpg])(Y-[img=~/QImg/2013-10-14-10-46-38/image017.jpg])为正
B、∑(X-[img=~/QImg/2013-10-14-10-46-38/image011.jpg])(Y-[img=~/QImg/2013-10-14-10-46-38/image017.jpg])为负
C、∑(Y-[img=~/QImg/2013-10-14-10-46-38/image017.jpg])大于∑(X一[img=~/QImg/2013-10-14-10-46-38/image011.jpg])
D、∑(Y-[img=~/QImg/2013-10-14-10-46-38/image017.jpg])小于∑(X-[img=~/QImg/2013-10-14-10-46-38/image011.jpg])
E、X变量大于Y变量