Table 4 Stepwise fitting for the First-Differenced Series.
From: Application of the adaptive sparrow search algorithm in medical supply engineering
Variables | Model ( 4 ) | Model ( 5 ) | Model ( 6 ) |
|---|---|---|---|
Constant | 1.005 (2.758***) | 0.999 (1.817*) | 0.970 (0.660) |
ar.L1 | 0.782 (6.588***) | 0.807 (6.821***) | 0.751 (4.437***) |
ar.L2 | −0.049 (−1.656) | \ | \ |
ar.L3 | −0.047 (−2.017**) | −0.029 (−1.079) | \ |
ar.L4 | 0.947 (36.193***) | 0.927 (26.376***) | 0.976 (47.116***) |
ar.L5 | −0.817 (−7.543***) | −0.837 (−7.663***) | −0.766 (−4.646***) |
ma.L1 | −0.570 (−3.348***) | −0.672 (−4.102***) | −0.500 (−2.318***) |
sma.L4 | −0.576 (−5.636***) | −0.435 (−3.428***) | −0.656 (−6.807***) |
Sigma2 | 8.633 (7.306***) | 9.507 (7.893***) | 9.440 (7.499***) |
