| Table 10. Estimated observation SDs. | |||
| Index | Fleet number | Age | Estimate |
| 1 | 1 | 1 | 0.70432 |
| 2 | 1 | 2 | 0.21810 |
| 3 | 1 | 3 | 0.26348 |
| 4 | 1 | 4 | 0.31613 |
| 5 | 1 | 5 | 0.28394 |
| 6 | 1 | 6 | 0.27371 |
| 7 | 1 | 7 | 0.59958 |
| 8 | 2 | 1 | 0.74878 |
| 9 | 2 | 2 | 0.39570 |
| 10 | 2 | 3 | 0.53222 |
| 11 | 2 | 4 | 0.88916 |
| 12 | 2 | 5 | 0.74559 |
| 13 | 2 | 6 | 0.79605 |
| 14 | 3 | 1 | 0.98620 |
| 15 | 3 | 2 | 0.61877 |
| 16 | 3 | 3 | 0.82073 |
| 17 | 4 | 1 | 0.94380 |
| 18 | 4 | 2 | 0.54556 |
| 19 | 4 | 3 | 0.66605 |
| 20 | 4 | 4 | 0.91925 |
| 21 | 5 | 1 | 0.74661 |
| 22 | 5 | 2 | 0.37370 |
| 23 | 5 | 3 | 0.52298 |
| 24 | 5 | 4 | 0.84217 |
| 25 | 5 | 5 | 1.10876 |
| 26 | 5 | 6 | 1.30287 |
| 27 | 6 | 1 | 0.25171 |
| 28 | 6 | 2 | 0.44365 |
| 29 | 6 | 3 | 0.33121 |
| 30 | 6 | 4 | 0.78455 |
| 31 | 6 | 5 | 0.55199 |
| 32 | 6 | 6 | 0.79014 |