LZ,你是不是搞错了？这哪是什么2*2列联表呀？ 请看下面的示例，认识一下真正的2*2列联表(别称：四格表）

data a;

 do r=1 to 2;

   do c=1 to 2;

     input w;

     output;

    end;

  end;

proc freq;

 weight w;

 tables r*c/chisq nocol norow nopct expected;

run;

下面是运行结果：

  The FREQ Procedure

                                      Table of r by c

                            r         c

                            Frequency|
                            Expected |       1|       2|  Total
                            ---------+--------+--------+
                                   1 |     37 |     48 |     85
                                     | 37.376 | 47.624 |
                            ---------+--------+--------+
                                   2 |     25 |     31 |     56
                                     | 24.624 | 31.376 |
                            ---------+--------+--------+
                            Total          62       79      141

                              Statistics for Table of r by c

                  Statistic                     DF       Value      Prob
                  ------------------------------------------------------
                  Chi-Square                     1      0.0170    0.8963
                  Likelihood Ratio Chi-Square    1      0.0170    0.8963
                  Continuity Adj. Chi-Square     1      0.0000    1.0000
                  Mantel-Haenszel Chi-Square     1      0.0169    0.8967
                  Phi Coefficient                      -0.0110
                  Contingency Coefficient               0.0110
                  Cramer's V                           -0.0110

                                   Fisher's Exact Test
                            ----------------------------------
                            Cell (1,1) Frequency (F)        37
                            Left-sided Pr <= F          0.5166
                            Right-sided Pr >= F         0.6197

                            Table Probability (P)       0.1363
                            Two-sided Pr <= P           1.0000

                                     Sample Size = 141