| Table 10. Estimated observation SDs. | |||
| Index | Fleet number | Age | Estimate |
| 1 | 1 | 1 | 0.74600 |
| 2 | 1 | 2 | 0.33193 |
| 3 | 1 | 3 | 0.17725 |
| 4 | 1 | 4 | 0.22357 |
| 5 | 1 | 5 | 0.09199 |
| 6 | 1 | 6 | 0.24826 |
| 7 | 1 | 7 | 0.64210 |
| 8 | 2 | 1 | 0.78856 |
| 9 | 2 | 2 | 0.45956 |
| 10 | 2 | 3 | 0.57081 |
| 11 | 2 | 4 | 0.88885 |
| 12 | 2 | 5 | 0.77531 |
| 13 | 2 | 6 | 0.79733 |
| 14 | 3 | 1 | 0.92046 |
| 15 | 3 | 2 | 0.55870 |
| 16 | 3 | 3 | 0.69188 |
| 17 | 4 | 1 | 0.95091 |
| 18 | 4 | 2 | 0.56893 |
| 19 | 4 | 3 | 0.65671 |
| 20 | 4 | 4 | 0.89129 |
| 21 | 5 | 1 | 0.84201 |
| 22 | 5 | 2 | 0.35590 |
| 23 | 5 | 3 | 0.54325 |
| 24 | 5 | 4 | 0.94188 |
| 25 | 5 | 5 | 1.14669 |
| 26 | 5 | 6 | 1.28802 |
| 27 | 6 | 1 | 0.24544 |
| 28 | 6 | 2 | 0.44806 |
| 29 | 6 | 3 | 0.40421 |
| 30 | 6 | 4 | 0.86388 |
| 31 | 6 | 5 | 0.50738 |
| 32 | 6 | 6 | 0.68479 |