| Table 10. Estimated observation SDs. | |||
| Index | Fleet number | Age | Estimate |
| 1 | 1 | 1 | 0.73339 |
| 2 | 1 | 2 | 0.30235 |
| 3 | 1 | 3 | 0.16041 |
| 4 | 1 | 4 | 0.21298 |
| 5 | 1 | 5 | 0.10055 |
| 6 | 1 | 6 | 0.24757 |
| 7 | 1 | 7 | 0.63584 |
| 8 | 2 | 1 | 0.76224 |
| 9 | 2 | 2 | 0.44941 |
| 10 | 2 | 3 | 0.56176 |
| 11 | 2 | 4 | 0.89338 |
| 12 | 2 | 5 | 0.77694 |
| 13 | 2 | 6 | 0.81015 |
| 14 | 3 | 1 | 0.94333 |
| 15 | 3 | 2 | 0.56874 |
| 16 | 3 | 3 | 0.68896 |
| 17 | 4 | 1 | 0.93659 |
| 18 | 4 | 2 | 0.54813 |
| 19 | 4 | 3 | 0.64276 |
| 20 | 4 | 4 | 0.87663 |
| 21 | 5 | 1 | 0.76761 |
| 22 | 5 | 2 | 0.36349 |
| 23 | 5 | 3 | 0.56770 |
| 24 | 5 | 4 | 0.94987 |
| 25 | 5 | 5 | 1.14957 |
| 26 | 5 | 6 | 1.28273 |
| 27 | 6 | 1 | 0.23971 |
| 28 | 6 | 2 | 0.44437 |
| 29 | 6 | 3 | 0.41898 |
| 30 | 6 | 4 | 0.86301 |
| 31 | 6 | 5 | 0.50515 |
| 32 | 6 | 6 | 0.68852 |