*
chapter_7_table_1

The following data consists of blood pressure measurements taken after the end of 
treatment for five individuals that were randomly assigned to one of four groups.
The initial question of interest is whether there is a significant difference 
between any of the group means, that is, are all of the population group means 
equal or is there a difference somewhere.

As before, we can perform a one-way ANOVA via the GLM procedure.

Note that this analysis does not take into consideration the interaction between 
biofeedback and drug. For pedagogical reasons this data set is analyzed as though 
it were a one-way design with four groups. As is explained in the text, the concept 
of an interaction is important and should not be overlooked. Table 7.7 shows the 
results of the data from Table 7.5, where the interaction of biofeedback and 
drug is explicitly taken into consideration. 
;


LIBNAME md 'd:\data files by type\sas data files\tables';
     Data c7t1;
       SET md.chapter_7_table_1;
PROC GLM DATA=c7t1;
CLASS group;
MODEL score = group;
RUN;