C=x2/N SS=∑∑x号-C sS,=∑(X)-C SS。=SSr-SS, dfr =N-1,df,=k-1;dfe =dfr-dfT t e T t e T t i i t T i j df N df k df df df SS SS SS C n x SS SS x C C x N = − = − = − = − = − = − =   1, 1; ( ) / 2 . 2 2