OPTIONS LS=72;
TITLE 'NUTRITION DEFICIENCY P.112, SS1, SS2 AND CENTERING HGT AND AGE';
DATA NUTRIDEF;
   INPUT WGT HGT AGE;
   LABEL WGT='WEIGHT'
         HGT='HEIGHT';
      CARDS;
64 57 8
71 59 10
53 49 6
67 62 11
55 51 8
58 50 7
77 55 10
57 48 9
56 42 10
51 42 6
76 61 12
68 57 9
;
PROC PRINT;

PROC MEANS;

DATA NUTRIDF1;
   SET NUTRIDEF;
   HGT=HGT-52.75;
   AGE=AGE-8.833;
   AGE2=AGE*AGE;


PROC CORR;

PROC REG DATA=NUTRIDF1;
      LIN: MODEL WGT=HGT /SS1 SS2;
      LIN: MODEL WGT=HGT AGE /SS1 SS2;
	  QUAD: MODEL WGT=HGT AGE2 /SS1 SS2;
	  quad: MODEL WGT=AGE AGE2 / SS1 SS2;
      QUAD: MODEL WGT=HGT AGE AGE2 /SS1 SS2;
RUN;