[SAS Program]
data rsq;
input gpa greq grev mat ar;
cards;
3.2 625 540 65 2.7
4.1 575 680 75 4.5
3.0 520 480 65 2.5
2.6 545 520 55 3.1
3.7 520 490 75 3.6
4.0 655 535 65 4.3
4.3 630 720 75 4.6
2.7 500 500 75 3.0
3.6 605 575 65 4.7
4.1 555 690 75 3.4
2.7 505 545 55 3.7
2.9 540 515 55 2.6
2.5 520 520 55 3.1
3.0 585 710 65 2.7
3.3 600 610 85 5.0
3.2 625 540 65 2.7
4.1 575 680 75 4.5
3.0 520 480 65 2.5
2.6 545 520 55 3.1
3.7 520 490 75 3.6
4.0 655 535 65 4.3
4.3 630 720 75 4.6
2.7 500 500 75 3.0
3.6 605 575 65 4.7
4.1 555 690 75 3.4
2.7 505 545 55 3.7
2.9 540 515 55 2.6
2.5 520 520 55 3.1
3.0 585 710 65 2.7
3.3 600 610 85 5.0
;
proc reg;
model gpa = greq grev mat ar / selection=rsquare;
run;
[SAS Output]
N = 30 Regression Models for Dependent Variable: GPA
Number in R-square Variables in Model
Model
1 0.38529398 AR
1 0.37350131 GREQ
1 0.36509196 MAT
1 0.33808659 GREV
----------------------------
2 0.58300302 GREQ MAT
2 0.51549156 GREV AR
2 0.50329629 GREQ AR
2 0.49347870 GREV MAT
2 0.49232208 MAT AR
2 0.48524079 GREQ GREV
---------------------------------
3 0.61704497 GREQ GREV MAT
3 0.61020192 GREQ MAT AR
3 0.57187378 GREV MAT AR
3 0.57160608 GREQ GREV AR
------------------------------------
4 0.64047409 GREQ GREV MAT AR
----------------------------------------