| Table 10. Estimated observation SDs. | |||
| Index | Fleet number | Age | Estimate |
| 1 | 1 | 1 | 0.70190 |
| 2 | 1 | 2 | 0.21144 |
| 3 | 1 | 3 | 0.26171 |
| 4 | 1 | 4 | 0.30735 |
| 5 | 1 | 5 | 0.28997 |
| 6 | 1 | 6 | 0.26260 |
| 7 | 1 | 7 | 0.60913 |
| 8 | 2 | 1 | 0.73609 |
| 9 | 2 | 2 | 0.39107 |
| 10 | 2 | 3 | 0.52913 |
| 11 | 2 | 4 | 0.98447 |
| 12 | 2 | 5 | 0.74810 |
| 13 | 2 | 6 | 0.90445 |
| 14 | 3 | 1 | 0.98458 |
| 15 | 3 | 2 | 0.61820 |
| 16 | 3 | 3 | 0.81735 |
| 17 | 4 | 1 | 0.94037 |
| 18 | 4 | 2 | 0.54156 |
| 19 | 4 | 3 | 0.66440 |
| 20 | 4 | 4 | 0.91683 |
| 21 | 5 | 1 | 0.74299 |
| 22 | 5 | 2 | 0.36931 |
| 23 | 5 | 3 | 0.51611 |
| 24 | 5 | 4 | 0.96303 |
| 25 | 5 | 5 | 1.22150 |
| 26 | 5 | 6 | 1.33653 |
| 27 | 6 | 1 | 0.25712 |
| 28 | 6 | 2 | 0.44698 |
| 29 | 6 | 3 | 0.31920 |
| 30 | 6 | 4 | 0.98649 |
| 31 | 6 | 5 | 0.55739 |
| 32 | 6 | 6 | 0.90146 |