A.0.78 B.0.79 C.0.85 D.0.90
A.40 B.60 C.100 D.50
A.X-1.96SE﹤Xt≤X+1.96SE B.X-1.96SE≥Xt C.X+1.96SE≤Xt D.X-1.96SE≌Xt≌X+1.96SE