四格表χ[img=~/QImg/2013-10-14-10-46-38/image004.jpg]检验的检验假设是

A、P[img=~/QImg/2013-10-14-10-46-38/image010.jpg]=P[img=~/QImg/2013-10-14-10-46-38/image013.jpg]
B、P[img=~/QImg/2013-10-14-10-46-38/image010.jpg]≠P[img=~/QImg/2013-10-14-10-46-38/image013.jpg]
C、π[img=~/QImg/2013-10-14-10-46-38/image010.jpg]=π[img=~/QImg/2013-10-14-10-46-38/image013.jpg]
D、π[img=~/QImg/2013-10-14-10-46-38/image010.jpg]≠π[img=~/QImg/2013-10-14-10-46-38/image013.jpg]
E、P≠兀