例15-03计算结果.lst

SAS应用_医学统计学的例题程序及其结果,学习SAS的必备资料.

                                       The SAS System        21:18 Tuesday, April 2, 2002   4

                     Stepwise Procedure for Dependent Variable Y

Step 1   Variable X4 Entered        R-square = 0.37166342   C(p) = 11.62836471

                       DF         Sum of Squares      Mean Square          F   Prob>F

       Regression       1            82.71438272      82.71438272      14.79   0.0007
       Error           25           139.83746913       5.59349877
       Total           26           222.55185185

                       Parameter        Standard          Type II
       Variable         Estimate           Error   Sum of Squares          F   Prob>F

       INTERCEP       3.00611680      2.36380099       9.04635086       1.62   0.2152
       X4             0.97820815      0.25437975      82.71438272      14.79   0.0007

Bounds on condition number:            1,            1
---------------------------------------------------------------------------------------------

Step 2   Variable X1 Entered        R-square = 0.48433796   C(p) =  7.41873917

                       DF         Sum of Squares      Mean Square          F   Prob>F

       Regression       2           107.79030899      53.89515449      11.27   0.0004
       Error           24           114.76154286       4.78173095
       Total           26           222.55185185

                       Parameter        Standard          Type II
       Variable         Estimate           Error   Sum of Squares          F   Prob>F

       INTERCEP       1.30989882      2.30766006       1.54069606       0.32   0.5756
       X1             0.67752515      0.29586221      25.07592627       5.24   0.0311
       X4             0.73233930      0.25854502      38.36520104       8.02   0.0092

Bounds on condition number:     1.208386,     4.833544
---------------------------------------------------------------------------------------------

Step 3   Variable X3 Entered        R-square = 0.54705469   C(p) =  5.96234675

                       DF         Sum of Squares      Mean Square          F   Prob>F

       Regression       3           121.74803331      40.58267777       9.26   0.0003
       Error           23           100.80381854       4.38277472
       Total           26           222.55185185

                       Parameter        Standard          Type II
       Variable         Estimate           Error   Sum of Squares          F   Prob>F

       INTERCEP       4.30858048      2.77570457      10.56017430       2.41   0.1343
       X1             0.54496823      0.29282863      15.17974375       3.46   0.0756
       X3            -0.21858679      0.12248733      13.95772432       3.18   0.0875
       X4             0.63532769      0.25342364      27.54548793       6.28   0.0197

Bounds on condition number:     1.291486,     11.27203
---------------------------------------------------------------------------------------------
                                       The SAS System        21:18 Tuesday, April 2, 2002   5

Step 4   Variable X2 Entered        R-square = 0.60080689   C(p) =  5.00000000

                       DF         Sum of Squares      Mean Square          F   Prob>F

       Regression       4           133.71068519      33.42767130       8.28   0.0003
       Error           22            88.84116667       4.03823485
       Total           26           222.55185185

                       Parameter        Standard          Type II
       Variable         Estimate           Error   Sum of Squares          F   Prob>F

       INTERCEP       5.94326785      2.82858990      17.82798275       4.41   0.0473
       X1             0.14244648      0.36565299       0.61285361       0.15   0.7006
       X2             0.35146549      0.20420423      11.96265188       2.96   0.0993
       X3            -0.27058527      0.12139379      20.06351186       4.97   0.0363
       X4             0.63820124      0.24326440      27.79391619       6.88   0.0155

Bounds on condition number:     2.185539,     26.04198
---------------------------------------------------------------------------------------------

Step 5   Variable X1 Removed        R-square = 0.59805313   C(p) =  3.15176275

                       DF         Sum of Squares      Mean Square          F   Prob>F

       Regression       3           133.09783157      44.36594386      11.41   0.0001
       Error           23            89.45402028       3.88930523
       Total           26           222.55185185

                       Parameter        Standard          Type II
       Variable         Estimate           Error   Sum of Squares          F   Prob>F

       INTERCEP       6.49961624      2.39615164      28.61665442       7.36   0.0124
       X2             0.40234578      0.15405315      26.52954201       6.82   0.0156
       X3            -0.28704423      0.11168616      25.69040553       6.61   0.0171
       X4             0.66323436      0.23025682      32.26867062       8.30   0.0084

Bounds on condition number:     1.178342,     10.06087
---------------------------------------------------------------------------------------------

All variables left in the model are significant at the 0.1000 level.
No other variable met the 0.1000 significance level for entry into the model.

                Summary of Stepwise Procedure for Dependent Variable Y

              Variable        Number   Partial    Model
       Step   Entered Removed     In      R**2     R**2      C(p)          F   Prob>F

          1   X4                   1    0.3717   0.3717   11.6284    14.7876   0.0007
          2   X1                   2    0.1127   0.4843    7.4187     5.2441   0.0311
          3   X3                   3    0.0627   0.5471    5.9623     3.1847   0.0875
          4   X2                   4    0.0538   0.6008    5.0000     2.9623   0.0993
          5           X1           3    0.0028   0.5981    3.1518     0.1518   0.7006