GOPTIONS RESET=ALL; 
TITLE "LABS EXAMPLE";
DATA LABS; INPUT X Y NUM @@; CARDS; 
0 18 11   1 25 14   1 24 10  0 17 11
1 27 17   0 22 13   0 20  9  1 23 11
 ; 
PROC GPLOT; PLOT Y*X=X/VREF = 19.25 24.75 HAXIS=-.5 TO 1.5; 
SYMBOL1 V=DOT I=NONE; 
PROC REG; MODEL Y = X; 
PROC TTEST; VAR Y; CLASS X; 
PROC GPLOT; PLOT Y*NUM=X/HAXIS=8 TO 18 VAXIS=15 TO 30 BY 5; 
SYMBOL1 V=DOT I=RL;
PROC REG; MODEL Y = X NUM; 
RUN;