| Variables | Coefficient | p-value |
| Constant | −0.182 | 0.0503 |
| AR (1) | −1.505 | <0.0001* |
| AR (2) | −0.605 | 0.0126* |
| MA (1) | −1.646 | <0.0001* |
| MA (2) | −0.723 | 0.0039* |