* Teacher's Age and Two Test Score;

data school;



subject    gender    teacher    t_age    pretest    posttest

------------------------------------------------------------

    1        M        JONES       35        67         81

    2        F        JONES       35        98         86

    3        M        JONES       35        52         92

    4        M        BLACK       42        41         74

    5        F        BLACK       42        46         76

    6        M        SMITH       68        38         80

    7        M        SMITH       68        49         71

    8        F        SMITH       68        38         63

    9        M        HAYES       23        71         72

   10        F        HAYES       23        46         92

   11        M        HAYES       23        70         90

   12        F        WONG        47        49         64

   13        M        WONG        47        50         63