Output from fitstep.sas

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             Illustrate stepwise selection using the Fitness Data            1
                              Stepwise Selection

              Stepwise Procedure for Dependent Variable OXY
The first 2 variables are forced into the model because of the INCLUDE=
option.

Step 0  The First  2 Vars Entered   R-square = 0.15063534   C(p) =109.70567678

                DF         Sum of Squares      Mean Square          F   Prob>F
Regression       2           128.24814438      64.12407219       2.48   0.1017
Error           28           723.13340046      25.82619287
Total           30           851.38154484

                Parameter        Standard          Type II
Variable         Estimate           Error   Sum of Squares          F   Prob>F
INTERCEP      77.29049413     13.85462884     803.75329459      31.12   0.0001
AGE           -0.37041610      0.18310074     105.69633373       4.09   0.0527
WEIGHT        -0.15823204      0.11457181      49.25991780       1.91   0.1782

Bounds on condition number:     1.057687,     4.230747
------------------------------------------------------------------------------

Step 1   Variable RUNTIME Entered   R-square = 0.77083060   C(p) = 13.34530613

                DF         Sum of Squares      Mean Square          F   Prob>F
Regression       3           656.27094936     218.75698312      30.27   0.0001
Error           27           195.11059548       7.22631835
Total           30           851.38154484

                Parameter        Standard          Type II
Variable         Estimate           Error   Sum of Squares          F   Prob>F
INTERCEP      93.12615008      7.55915630    1096.76539223     151.77   0.0001
AGE           -0.17387679      0.09954587      22.04722118       3.05   0.0921
WEIGHT        -0.05443652      0.06180913       5.60521700       0.78   0.3862
RUNTIME       -3.14038657      0.36737984     528.02280498      73.07   0.0001

Bounds on condition number:     1.117292,     9.888012
------------------------------------------------------------------------------

Step 2   Variable RUNPULSE Entered  R-square = 0.81649255   C(p) =  8.10351211

                DF         Sum of Squares      Mean Square          F   Prob>F
Regression       4           695.14669132     173.78667283      28.92   0.0001
Error           26           156.23485352       6.00903283
Total           30           851.38154484

                Parameter        Standard          Type II
Variable         Estimate           Error   Sum of Squares          F   Prob>F
             Illustrate stepwise selection using the Fitness Data            2
                              Stepwise Selection

INTERCEP     115.66229667     11.22578205     637.90350440     106.16   0.0001
AGE           -0.27641726      0.09932454      46.53950756       7.74   0.0099
WEIGHT        -0.04932333      0.05639914       4.59583505       0.76   0.3898
RUNTIME       -2.77236856      0.36492045     346.82476452      57.72   0.0001
RUNPULSE      -0.12932379      0.05084420      38.87574195       6.47   0.0173

Bounds on condition number:     1.356487,     20.30177
------------------------------------------------------------------------------

Step 3   Variable MAXPULSE Entered  R-square = 0.84800181   C(p) =  5.10627546

                DF         Sum of Squares      Mean Square          F   Prob>F
Regression       5           721.97309402     144.39461880      27.90   0.0001
Error           25           129.40845082       5.17633803
Total           30           851.38154484

                Parameter        Standard          Type II
Variable         Estimate           Error   Sum of Squares          F   Prob>F
INTERCEP     102.20427520     11.97928972     376.78934930      72.79   0.0001
AGE           -0.21962138      0.09550245      27.37429100       5.29   0.0301
WEIGHT        -0.07230234      0.05331009       9.52156710       1.84   0.1871
RUNTIME       -2.68252297      0.34098544     320.35967836      61.89   0.0001
RUNPULSE      -0.37340085      0.11714109      52.59623720      10.16   0.0038
MAXPULSE       0.30490783      0.13393642      26.82640270       5.18   0.0316

Bounds on condition number:     8.731225,     104.8254
------------------------------------------------------------------------------

All variables left in the model are required or significant at the 0.1500
level.
No other variable met the 0.1500 significance level for entry into the model.

        Summary of Stepwise Procedure for Dependent Variable OXY

       Variable        Number   Partial    Model
Step   Entered Removed     In      R**2     R**2      C(p)          F   Prob>F
   1   RUNTIME              3    0.6202   0.7708   13.3453    73.0694   0.0001
   2   RUNPULSE             4    0.0457   0.8165    8.1035     6.4696   0.0173
   3   MAXPULSE             5    0.0315   0.8480    5.1063     5.1825   0.0316