样本均数与总体均数比较或配对比较的样本含量计算公式为

A、[img=~/QImg/2013-10-14-11-12-39/image026.jpg]
B、[img=~/QImg/2013-10-14-11-12-39/image027.jpg]
C、[img=~/QImg/2013-10-14-11-12-39/image028.jpg]
D、[img=~/QImg/2013-10-14-11-12-39/image029.jpg]
E、以上都不对