根据 wubuyun2009 数据,运行后,样本例数为何都变为735, 插补前后统计量如下,就不明白了
The MEANS Procedure
插补前:
Variable N Mean Std Dev Minimum Maximum
p0 142 156.4788732 94.9787373 24.0000000 688.0000000
m0 142 11.4443662 1.5279210 7.2000000 15.3000000
p1 131 131.9465649 79.9774308 5.0000000 564.0000000
m1 130 11.4200000 1.4591810 6.6000000 15.2000000
p2 130 123.1615385 76.2745758 5.0000000 391.0000000
m2 129 11.5604651 1.5401105 6.7000000 16.7000000
p3 131 123.8549618 77.8569815 5.0000000 389.0000000
m3 130 11.4153846 1.4833161 6.9000000 14.5000000
插补后:
Variable N Mean Std Dev Minimum Maximum
p0 735 155.7239021 93.9776364 12.7709523 688.0000000
m0 735 11.4330833 1.5216869 7.2000000 15.3000000
p1 735 133.9874874 80.5302179 5.0000000 564.0000000
m1 735 11.4133299 1.4643792 6.6000000 15.5965542
p2 735 121.2553436 75.5566324 -29.6570029 391.0000000
m2 735 11.5713799 1.5156239 6.7000000 16.7000000
p3 735 121.3471743 77.4425748 -70.9120719 389.0000000
m3 735 11.4415794 1.4769174 6.9000000 15.2626647