| Table 10. Estimated observation SDs. | |||
| Index | Fleet number | Age | Estimate |
| 1 | 1 | 1 | 0.57835 |
| 2 | 1 | 2 | 0.23281 |
| 3 | 1 | 3 | 0.06024 |
| 4 | 1 | 4 | 0.06024 |
| 5 | 1 | 5 | 0.06024 |
| 6 | 1 | 6 | 0.06024 |
| 7 | 2 | 1 | 0.47294 |
| 8 | 2 | 2 | 0.24714 |
| 9 | 2 | 3 | 0.24714 |
| 10 | 2 | 4 | 0.24714 |
| 11 | 2 | 5 | 0.24714 |
| 12 | 3 | 1 | 0.39923 |
| 13 | 3 | 2 | 0.27220 |
| 14 | 3 | 3 | 0.27220 |
| 15 | 3 | 4 | 0.27220 |
| 16 | 3 | 5 | 0.27220 |
| 17 | 4 | 1 | 0.37315 |
| 18 | 4 | 2 | 0.25458 |
| 19 | 4 | 3 | 0.25458 |
| 20 | 4 | 4 | 0.25458 |
| 21 | 5 | 1 | 0.20265 |
| 22 | 5 | 2 | 0.20265 |
| 23 | 5 | 3 | 0.23990 |
| 24 | 5 | 4 | 0.23990 |