对SS[img=~/QImg/2013-10-14-10-46-38/image065.jpg]理解正确的是

A、SS[img=~/QImg/2013-10-14-10-46-38/image065.jpg]=([img=~/QImg/2013-10-14-10-46-38/image011.jpg]-X)[img=~/QImg/2013-10-14-10-46-38/image004.jpg]
B、SS[img=~/QImg/2013-10-14-10-46-38/image065.jpg]是一组变量值总的离均差和
C、一组资料的方差等于SS[img=~/QImg/2013-10-14-10-46-38/image065.jpg]
D、SS[img=~/QImg/2013-10-14-10-46-38/image065.jpg]总可被分解为组间离均差平方和与组内离均差平方和两部分
E、对一组资料做方差分析时,SS[img=~/QImg/2013-10-14-10-46-38/image065.jpg]=SS[img=~/QImg/2013-10-14-10-46-38/image066.jpg]+SS[img=~/QImg/2013-10-14-10-46-38/image067.jpg]