Backward elimination
Summary of backward elimination
|
Step |
Variables removed |
Number of variables |
R-square |
Model C(p) |
F-value |
Pr>F |
|
1 |
X2 |
3 |
0.4921 |
3.3929 |
0.39 |
0.5396 |
|
2 |
X2X3 |
2 |
0.4562 |
2.5506 |
1.20 |
0.2885 |
|
3 |
X2X3X4 |
1 |
0.4204 |
1.7060 |
1.19 |
0.2907 |
By backward elimination
and under 0.05significant level, X2, X3 and X4
are removed because the p-values of X2, X3 and X4
are 0.5396, 0.2885 and 0.2907 which are greater than 0.05.
Conclusion:
The best model is 
.