*** One way Anova: BROKER DATASET;

DATA STOCK;
	INPUT TRADE BROKER@@;
DATALINES;
12 1 3 1 5 1 -1 1 12 1 5 1
7 2 17 2 13 2 11 2 7 2 17 2
8 3 1 3 7 3 4 3 3 3 7 3
21 4 10 4 15 4 12 4 20 4 6 4
24 5 13 5 14 5 18 5 14 5 19 5
;
PROC PRINT DATA=STOCK;
RUN;

**ANALYSIS AND MULTIPLE COMPARISONS OF INSURANCE DATA;
PROC GLM DATA=STOCK;
	TITLE "ANOVA OF STOCK DATA";
	CLASS BROKER;
	MODEL TRADE=BROKER;
	MEANS BROKER / SNK;
	MEANS BROKER/ DUNCAN;
	MEANS BROKER / DUNNETT; ** THE FIRST LEVEL IS THE CONTROL;
	CONTRAST 'BROKER 1 VS THE OTHERS' BROKER 4 -1 -1 -1 -1;
	OUTPUT OUT= GRAPH 	
		P=PREDICTED
		R=RESIDUAL;
RUN;

**GRAPHICAL SUMMARIES OF RESIDUALS TO CHECK ASSUMPTIONS;
PROC UNIVARIATE DATA=GRAPH NORMAL PLOT;
	VAR RESIDUAL;
RUN;

SYMBOL VALUE=DOT COLOR=RED I=R;

PROC GPLOT DATA=GRAPH;
	TITLE "RESIDUALS VERSUS PREDICTED";
	PLOT RESIDUAL * PREDICTED;
RUN;