| Table 10. Estimated observation SDs. | |||
| Index | Fleet number | Age | Estimate |
| 1 | 1 | 1 | 0.69778 |
| 2 | 1 | 2 | 0.23360 |
| 3 | 1 | 3 | 0.31812 |
| 4 | 1 | 4 | 0.38575 |
| 5 | 1 | 5 | 0.33536 |
| 6 | 1 | 6 | 0.24282 |
| 7 | 1 | 7 | 0.56973 |
| 8 | 2 | 1 | 0.71249 |
| 9 | 2 | 2 | 0.34678 |
| 10 | 2 | 3 | 0.48407 |
| 11 | 2 | 4 | 0.91407 |
| 12 | 2 | 5 | 0.72924 |
| 13 | 2 | 6 | 0.77185 |
| 14 | 3 | 1 | 0.97297 |
| 15 | 3 | 2 | 0.63519 |
| 16 | 3 | 3 | 0.80593 |
| 17 | 4 | 1 | 0.90899 |
| 18 | 4 | 2 | 0.49538 |
| 19 | 4 | 3 | 0.64001 |
| 20 | 4 | 4 | 0.87746 |
| 21 | 5 | 1 | 0.73428 |
| 22 | 5 | 2 | 0.37850 |
| 23 | 5 | 3 | 0.51908 |
| 24 | 5 | 4 | 0.82431 |
| 25 | 5 | 5 | 1.16161 |
| 26 | 5 | 6 | 1.23378 |
| 27 | 6 | 1 | 0.23692 |
| 28 | 6 | 2 | 0.42160 |
| 29 | 6 | 3 | 0.36435 |
| 30 | 6 | 4 | 0.72598 |
| 31 | 6 | 5 | 0.58981 |
| 32 | 6 | 6 | 0.77038 |