| Table 10. Estimated observation SDs. | |||
| Index | Fleet number | Age | Estimate |
| 1 | 1 | 1 | 0.70134 |
| 2 | 1 | 2 | 0.21168 |
| 3 | 1 | 3 | 0.25958 |
| 4 | 1 | 4 | 0.31256 |
| 5 | 1 | 5 | 0.28165 |
| 6 | 1 | 6 | 0.26777 |
| 7 | 1 | 7 | 0.59848 |
| 8 | 2 | 1 | 0.73359 |
| 9 | 2 | 2 | 0.39044 |
| 10 | 2 | 3 | 0.52914 |
| 11 | 2 | 4 | 0.88886 |
| 12 | 2 | 5 | 0.74431 |
| 13 | 2 | 6 | 0.79387 |
| 14 | 3 | 1 | 0.98632 |
| 15 | 3 | 2 | 0.61983 |
| 16 | 3 | 3 | 0.82248 |
| 17 | 4 | 1 | 0.94018 |
| 18 | 4 | 2 | 0.54342 |
| 19 | 4 | 3 | 0.66436 |
| 20 | 4 | 4 | 0.91824 |
| 21 | 5 | 1 | 0.74250 |
| 22 | 5 | 2 | 0.37021 |
| 23 | 5 | 3 | 0.51827 |
| 24 | 5 | 4 | 0.83732 |
| 25 | 5 | 5 | 1.10321 |
| 26 | 5 | 6 | 1.29489 |
| 27 | 6 | 1 | 0.25533 |
| 28 | 6 | 2 | 0.44579 |
| 29 | 6 | 3 | 0.32496 |
| 30 | 6 | 4 | 0.78489 |
| 31 | 6 | 5 | 0.55863 |
| 32 | 6 | 6 | 0.78884 |