sign obs sum ranks expected positive 332.5 negative zero unadjusted variance 1051.50 ad justment for ties ad justment for zeros ad justed variance 4049.50 Ho: x=38 z=3.764 Prob>|z|=0.0002 P<001,按照a=005的水准拒绝H0,接收H1,差别有统计学意义。可认为 该型肿瘤I期患者生存时间的总体中位数大于38天。sign | obs sum ranks expected -------------+--------------------------------- positive | 27 572 332.5 negative | 8 93 332.5 zero | 1 1 1 -------------+--------------------------------- all | 36 666 666 unadjusted variance 4051.50 adjustment for ties -1.75 adjustment for zeros -0.25 ---------- adjusted variance 4049.50 Ho: x = 38 z = 3.764 Prob > |z| = 0.0002 P<0.01，按照 α=0.05 的水准拒绝 H0，接收 H1，差别有统计学意义。可认为 该型肿瘤 III 期患者生存时间的总体中位数大于 38 天