Birthweight Data                                           09:02 Wednesday, May 24, 2017 416
                                                                            sashelp.bweight

                                                                          The TTEST Procedure

                                                                Variable:  Weight  (Infant Birth Weight)

                                            Boy                N        Mean     Std Dev     Std Err     Minimum     Maximum

                                            0              24208      3310.6       547.7      3.5204       240.0      6350.0
                                            1              25792      3427.3       577.7      3.5970       284.0      5970.0
                                            Diff (1-2)                -116.7       563.4      5.0416

                                     Boy           Method               Mean       95% CL Mean        Std Dev      95% CL Std Dev

                                     0                                3310.6      3303.7   3317.5       547.7       542.9    552.7
                                     1                                3427.3      3420.2   3434.3       577.7       572.7    582.7
                                     Diff (1-2)    Pooled             -116.7      -126.6   -106.8       563.4       559.9    566.9
                                     Diff (1-2)    Satterthwaite      -116.7      -126.6   -106.8

                                                      Method           Variances        DF    t Value    Pr > |t|

                                                      Pooled           Equal         49998     -23.15      <.0001
                                                      Satterthwaite    Unequal       49993     -23.18      <.0001

                                                                         Equality of Variances

                                                           Method      Num DF    Den DF    F Value    Pr > F

                                                           Folded F     25791     24207       1.11    <.0001


                                                                   Variable:  MomAge  (Mother's Age)

                                            Boy                N        Mean     Std Dev     Std Err     Minimum     Maximum

                                            0              24208      0.4129      5.7373      0.0369     -9.0000     18.0000
                                            1              25792      0.4192      5.7202      0.0356     -9.0000     18.0000
                                            Diff (1-2)              -0.00624      5.7285      0.0513





                                                                                test ODS
                                                                            Birthweight Data                                           09:02 Wednesday, May 24, 2017 417
                                                                            sashelp.bweight

                                                                          The TTEST Procedure

                                                                   Variable:  MomAge  (Mother's Age)

                                     Boy           Method               Mean       95% CL Mean        Std Dev      95% CL Std Dev

                                     0                                0.4129      0.3406   0.4852      5.7373      5.6867   5.7889
                                     1                                0.4192      0.3493   0.4890      5.7202      5.6713   5.7700
                                     Diff (1-2)    Pooled           -0.00624     -0.1067   0.0942      5.7285      5.6932   5.7642
                                     Diff (1-2)    Satterthwaite    -0.00624     -0.1067   0.0942

                                                      Method           Variances        DF    t Value    Pr > |t|

                                                      Pooled           Equal         49998      -0.12      0.9031
                                                      Satterthwaite    Unequal       49779      -0.12      0.9031

                                                                         Equality of Variances

                                                           Method      Num DF    Den DF    F Value    Pr > F

                                                           Folded F     24207     25791       1.01    0.6369


                                                         Variable:  MomWtGain  (Mother's Pregnancy Weight Gain)

                                            Boy                N        Mean     Std Dev     Std Err     Minimum     Maximum

                                            0              24208      0.3423     12.8896      0.0828    -30.0000     68.0000
                                            1              25792      1.0536     12.8542      0.0800    -30.0000     68.0000
                                            Diff (1-2)               -0.7113     12.8713      0.1152

                                     Boy           Method               Mean       95% CL Mean        Std Dev      95% CL Std Dev

                                     0                                0.3423      0.1799   0.5047     12.8896     12.7758  13.0054
                                     1                                1.0536      0.8967   1.2105     12.8542     12.7442  12.9661
                                     Diff (1-2)    Pooled            -0.7113     -0.9371  -0.4856     12.8713     12.7921  12.9516
                                     Diff (1-2)    Satterthwaite     -0.7113     -0.9371  -0.4856




                                                                                test ODS
                                                                            Birthweight Data                                           09:02 Wednesday, May 24, 2017 418
                                                                            sashelp.bweight

                                                                          The TTEST Procedure

                                                         Variable:  MomWtGain  (Mother's Pregnancy Weight Gain)

                                                      Method           Variances        DF    t Value    Pr > |t|

                                                      Pooled           Equal         49998      -6.18      <.0001
                                                      Satterthwaite    Unequal       49780      -6.18      <.0001

                                                                         Equality of Variances

                                                           Method      Num DF    Den DF    F Value    Pr > F

                                                           Folded F     24207     25791       1.01    0.6637

                                                                                test ODS