* 
chapter_12_table_21

The data in Table 12.21 consist of hypothetical aggressiveness scores for 6 monkeys who 
have been exposed to three types of drugs (A, B, and C). In order to control for potential 
order effects, a Latin square design is utilized. In particular, two randomly constituted 
squares are formed with three monkeys randomly assigned to each square and also randomly 
assigned to the particular row of the square that assigns the order that they are exposed 
to treatment;

LIBNAME md 'd:\data files by type\sas data files\tables';
DATA c12t21; 
SET md.chapter_12_table_21;

* The hypothesis of primary interest is whether the drugs differ in their effectiveness in 
controlling aggression in the monkeys. Thus, the test of the condition main effect is of 
primary interest. The current procedure reproduces the results for test of the condition 
main effect shown on page 615. The following SAS syntax is used to obtain the test of 
condition for an ANOVA on a Latin square design from the data in Chapter 12, Table 21
The LSMEANS line yields the results given in Table 12.22.;

PROC GLM;  
CLASS subject cond time;
MODEL dv = subject cond time / solution;
RANDOM subject;
LSMEANS subject cond time;
RUN;