*
chapter_3_table_1

The data set analyzed to replicate Chapter 3 Table 1 consists of IQ 
(WISC-R) measurements on six hyperactive children. The question of 
interest is: "are hyperactive children in the school district brighter 
than the average student?" The mean IQ among the students is known to 
be 98. Thus, the null hypothesis in this situation is that the 
population mean for the hyperactive students is also 98.

To answer such a question we perform a one sample t-test specifying the null 
hypothesis (H0) as 98. Because a t-value squared with X degrees of freedom is equivalent
to an F value with one numerator and X denominator degrees of freedom, our results 
are equivalent to those reported in the book. Recall that the observed F-value 
(with 1 and 5 degrees of freedom) in the book is 9, whereas our t-value (with 5 
degrees of freedom) is 3.
;

LIBNAME md 'd:\data files by type\sas data files\tables';
     Data c3t1;
       SET md.chapter_3_table_1;
PROC TTEST H0=98;
RUN;