*
chapter_13_table_12

For the hypothetical data contained in Table 13.2, the linear and 
quadratic D variables were formed by making use of the appropriate 
coefficients from Appendix Table A.10. Because the eight participants 
were measured at three occasions, both a linear and a quadratic effect
can be tested. The question of interest in this instance is: "Is there
a linear and/or quadratic trend exhibited by the group over time?" Recall
that in the book (pages 646-647) it was shown that the D variables for 
linear and quadratic effects led to an omnibus F test of 19.148, which
was a value previously obtained for the omnibus effect. Because the 
particular values chosen for the D variables do not matter (unless it 
leads to a linear combination of columns), we will focus only on the 
tests of the individual contrasts when analyzing the data given in 
Table 12.

Because the data is already in the form of a D variable, all that needs
to be done is to test the data to see if the mean differs from zero. 
The easiest way to do this is by making use of PROC TTEST and 
specifying the null value to be zero. 
;

LIBNAME md 'd:\data files by type\sas data files\tables';
     Data c13t12;
       SET md.chapter_13_table_12;
PROC TTEST DATA=c13t12 H0=0;
RUN;