| Table 10. Estimated observation SDs. | |||
| Index | Fleet number | Age | Estimate |
| 1 | 1 | 1 | 0.70376 |
| 2 | 1 | 2 | 0.21719 |
| 3 | 1 | 3 | 0.26337 |
| 4 | 1 | 4 | 0.31653 |
| 5 | 1 | 5 | 0.28388 |
| 6 | 1 | 6 | 0.27316 |
| 7 | 1 | 7 | 0.59952 |
| 8 | 2 | 1 | 0.74944 |
| 9 | 2 | 2 | 0.39686 |
| 10 | 2 | 3 | 0.53216 |
| 11 | 2 | 4 | 0.88956 |
| 12 | 2 | 5 | 0.74637 |
| 13 | 2 | 6 | 0.79623 |
| 14 | 3 | 1 | 0.98615 |
| 15 | 3 | 2 | 0.61850 |
| 16 | 3 | 3 | 0.82054 |
| 17 | 4 | 1 | 0.94235 |
| 18 | 4 | 2 | 0.54372 |
| 19 | 4 | 3 | 0.66442 |
| 20 | 4 | 4 | 0.91802 |
| 21 | 5 | 1 | 0.74641 |
| 22 | 5 | 2 | 0.37419 |
| 23 | 5 | 3 | 0.52241 |
| 24 | 5 | 4 | 0.84153 |
| 25 | 5 | 5 | 1.10827 |
| 26 | 5 | 6 | 1.30306 |
| 27 | 6 | 1 | 0.25172 |
| 28 | 6 | 2 | 0.44329 |
| 29 | 6 | 3 | 0.33010 |
| 30 | 6 | 4 | 0.78426 |
| 31 | 6 | 5 | 0.55229 |
| 32 | 6 | 6 | 0.79018 |