Can someone check my code and tell me what I am doing wrong? My regressions are not changing so i think my code must be wrong.
data foodus;
input y x n;
cards;
15.998 62.476 1.
16.652 82.304 5.
21.741 74.679 3.
7.431 39.151 3.
10.481 64.724 5.
13.548 36.786 3.
23.256 83.052 4.
17.976 86.935 1.
14.161 88.233 2.
8.825 38.695 2.
14.184 73.831 7.
19.604 77.122 3.
13.728 45.519 2.
21.141 82.251 2.
17.446 59.862 3.
9.629 26.563 3.
14.005 61.818 2.
9.160 29.682 1.
18.831 50.825 5.
7.641 71.062 4.
13.882 41.990 4.
9.670 37.324 3.
21.604 86.352 5.
10.866 45.506 2.
28.980 69.929 6.
10.882 61.041 2.
18.561 82.469 1.
11.629 44.208 2.
18.067 49.467 5.
14.539 25.905 5.
19.192 79.178 5.
25.918 75.811 3.
28.833 82.718 6.
15.869 48.311 4.
14.910 42.494 5.
9.550 40.573 4.
23.066 44.872 6.
14.751 27.167 7.
;
run;
proc reg;
model y =x n;
run;
data GQ;
set foodus;
proc sort; by x;
proc print;
run;
data GQ1;
set GQ;
if _n_ le 19;
proc reg data=GQ1;
Part1: model y = x n;
run;
data GQ2;
set GQ;
if _n_ gt 20;
proc reg data =GQ1;
Part2: model y = x n;
run;