| Table 10. Estimated observation SDs. | |||
| Index | Fleet number | Age | Estimate |
| 1 | 1 | 1 | 0.70243 |
| 2 | 1 | 2 | 0.21520 |
| 3 | 1 | 3 | 0.26191 |
| 4 | 1 | 4 | 0.31480 |
| 5 | 1 | 5 | 0.28294 |
| 6 | 1 | 6 | 0.27086 |
| 7 | 1 | 7 | 0.59911 |
| 8 | 2 | 1 | 0.73597 |
| 9 | 2 | 2 | 0.39217 |
| 10 | 2 | 3 | 0.52944 |
| 11 | 2 | 4 | 0.88898 |
| 12 | 2 | 5 | 0.74540 |
| 13 | 2 | 6 | 0.79462 |
| 14 | 3 | 1 | 0.98650 |
| 15 | 3 | 2 | 0.61926 |
| 16 | 3 | 3 | 0.82174 |
| 17 | 4 | 1 | 0.94177 |
| 18 | 4 | 2 | 0.54278 |
| 19 | 4 | 3 | 0.66376 |
| 20 | 4 | 4 | 0.91703 |
| 21 | 5 | 1 | 0.74393 |
| 22 | 5 | 2 | 0.37151 |
| 23 | 5 | 3 | 0.52002 |
| 24 | 5 | 4 | 0.83895 |
| 25 | 5 | 5 | 1.10552 |
| 26 | 5 | 6 | 1.29914 |
| 27 | 6 | 1 | 0.25380 |
| 28 | 6 | 2 | 0.44466 |
| 29 | 6 | 3 | 0.32723 |
| 30 | 6 | 4 | 0.78464 |
| 31 | 6 | 5 | 0.55566 |
| 32 | 6 | 6 | 0.78964 |