DM 'LOG;CLEAR;OUT;CLEAR';
OPTIONS NONUMBER NODATE LS=76 PS=66;

DATA INA; INPUT POINT X1 X2 X3 Y @@;
CARDS;
 1  1  0 0 11.0   2  0 1  0  8.6   3 0  0  1 16.4
 1  1  0 0 12.2   2  0 1  0  8.1   3 0  0  1 16.0
 4 .5 .5 0  7.9   5 .5 0 .5 13.4   6 0 .5 .5 15.9
 4 .5 .5 0  7.4   5 .5 0 .5 14.4   6 0 .5 .5 16.4
 4 .5 .5 0  7.5   5 .5 0 .5 14.0   6 0 .5 .5 16.6
 7 .333 .333 .333 18.2    
 8 .667 .167 .167 10.4   
 9 .167 .667 .167  9.6   
10 .167 .167 .667 15.2   
;
*************************;
*** First-order model ***;
*************************;

PROC GLM DATA=INA;
     MODEL Y = X1 X2 X3 / SOLUTION NOINT SS3;
TITLE 'FINAL EXAM -- FIRST-ORDER MODEL';

PROC RSREG DATA=INA; MODEL Y = X1 X2 X3 / COVAR=3 LACKFIT;
TITLE 'FINAL EXAM --- LACK-OF-FIT TEST SUM OF SQUARES';

RUN;