Table 5 Post-hoc test results (Tukey’s HSD).
From: Re-evaluation of excavation class limits for underground excavations based on new data
Groups | Comparison | Mean Difference | p-Value | Significance |
|---|---|---|---|---|
1–2 | RMR89-Q | -50.15 | < 0.001 | ✅ Yes |
1–3 | RMR89-GSI | 0.26 | ≈ 1.00 | ❌ No |
1–4 | RMR89-σcm | -45.97 | < 0.001 | ✅ Yes |
2–3 | Q-GSI | 50.41 | < 0.001 | ✅ Yes |
2–4 | Q-σcm | 4.18 | 0.57 | ❌ No |
3–4 | GSI-σcm | -46.23 | < 0.001 | ✅ Yes |
