| Table 10. Estimated observation SDs. | |||
| Index | Fleet number | Age | Estimate |
| 1 | 1 | 1 | 0.70535 |
| 2 | 1 | 2 | 0.19963 |
| 3 | 1 | 3 | 0.23504 |
| 4 | 1 | 4 | 0.28822 |
| 5 | 1 | 5 | 0.26123 |
| 6 | 1 | 6 | 0.25160 |
| 7 | 1 | 7 | 0.59878 |
| 8 | 2 | 1 | 0.74402 |
| 9 | 2 | 2 | 0.36241 |
| 10 | 2 | 3 | 0.47108 |
| 11 | 2 | 4 | 0.87807 |
| 12 | 2 | 5 | 0.72820 |
| 13 | 2 | 6 | 0.76951 |
| 14 | 3 | 1 | 0.94611 |
| 15 | 3 | 2 | 0.64657 |
| 16 | 3 | 3 | 0.79652 |
| 17 | 4 | 1 | 0.78529 |
| 18 | 4 | 2 | 0.50389 |
| 19 | 4 | 3 | 0.66305 |
| 20 | 4 | 4 | 0.85662 |
| 21 | 5 | 1 | 0.86456 |
| 22 | 5 | 2 | 0.42387 |
| 23 | 5 | 3 | 0.55023 |
| 24 | 5 | 4 | 0.89162 |
| 25 | 5 | 5 | 1.15829 |
| 26 | 5 | 6 | 1.32020 |
| 27 | 6 | 1 | 0.20547 |
| 28 | 6 | 2 | 0.42119 |
| 29 | 6 | 3 | 0.37391 |
| 30 | 6 | 4 | 0.78668 |
| 31 | 6 | 5 | 0.52217 |
| 32 | 6 | 6 | 0.75547 |