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| Variety | ADF test value | 1% critical value | 5% critical value | 10% critical value | P-value | Conclusion |
|---|---|---|---|---|---|---|
| HC (Hot coil) | -0.198257 | -2.564975 | -1.940826 | -1.616699 | 0.6150 | Unsteady |
| RB (Rebar) | -0.087496 | -2.564975 | -1.940826 | -1.616699 | 0.6536 | Unsteady |
| ρHC | -309.5277 | -2.564975 | -1.940826 | -1.616699 | 0.0001 | Steady |
| ρRB | -309.3130 | -2.564975 | -1.940826 | -1.616699 | 0.0001 | Steady |
