The SAS System       21:56 Monday, December 8, 2003  17

--------------------------------------- *COUNTRY ID*=410 ---------------------------------------

                                       The REG Procedure
                                         Model: MODEL1
                 Dependent Variable: BSMPV01 *1ST PLAUSIBLE VALUE MATHEMATICS*

                                      Analysis of Variance

                                             Sum of           Mean
         Source                   DF        Squares         Square    F Value    Pr > F

         Model                     2      158.36883       79.18441      86.57    <.0001
         Error                  2898     2650.82954        0.91471
         Corrected Total        2900     2809.19837


                      Root MSE              0.95640    R-Square     0.0564
                      Dependent Mean        0.74102    Adj R-Sq     0.0557
                      Coeff Var           129.06521


                                      Parameter Estimates

                                                    Parameter      Standard
Variable    Label                            DF      Estimate         Error   t Value   Pr > |t|

Intercept   Intercept                         1       0.55085       0.02753     20.01     <.0001
college2                                      1       0.53253       0.04279     12.45     <.0001
boy2                                          1       0.13415       0.03564      3.76     0.0002
                                         The SAS System       21:56 Monday, December 8, 2003  18

--------------------------------------- *COUNTRY ID*=840 ---------------------------------------

                                       The REG Procedure
                                         Model: MODEL1
                 Dependent Variable: BSMPV01 *1ST PLAUSIBLE VALUE MATHEMATICS*

                                      Analysis of Variance

                                             Sum of           Mean
         Source                   DF        Squares         Square    F Value    Pr > F

         Model                     2      190.64967       95.32484     144.29    <.0001
         Error                  6941     4585.65893        0.66066
         Corrected Total        6943     4776.30860


                      Root MSE              0.81281    R-Square     0.0399
                      Dependent Mean       -0.30958    Adj R-Sq     0.0396
                      Coeff Var          -262.55442


                                      Parameter Estimates

                                                    Parameter      Standard
Variable    Label                            DF      Estimate         Error   t Value   Pr > |t|

Intercept   Intercept                         1      -0.43521       0.01515    -28.74     <.0001
college2                                      1       0.35798       0.02120     16.88     <.0001
boy2                                          1       0.03376       0.01951      1.73     0.0836