| Table 10. Estimated observation SDs. | |||
| Index | Fleet number | Age | Estimate |
| 1 | 1 | 1 | 0.72666 |
| 2 | 1 | 2 | 0.30195 |
| 3 | 1 | 3 | 0.16679 |
| 4 | 1 | 4 | 0.21435 |
| 5 | 1 | 5 | 0.10319 |
| 6 | 1 | 6 | 0.25284 |
| 7 | 1 | 7 | 0.64302 |
| 8 | 2 | 1 | 0.77665 |
| 9 | 2 | 2 | 0.45714 |
| 10 | 2 | 3 | 0.57324 |
| 11 | 2 | 4 | 0.89531 |
| 12 | 2 | 5 | 0.77523 |
| 13 | 2 | 6 | 0.80306 |
| 14 | 3 | 1 | 0.94628 |
| 15 | 3 | 2 | 0.56932 |
| 16 | 3 | 3 | 0.69304 |
| 17 | 4 | 1 | 0.95384 |
| 18 | 4 | 2 | 0.56637 |
| 19 | 4 | 3 | 0.65454 |
| 20 | 4 | 4 | 0.89275 |
| 21 | 5 | 1 | 0.76803 |
| 22 | 5 | 2 | 0.36362 |
| 23 | 5 | 3 | 0.56555 |
| 24 | 5 | 4 | 0.95184 |
| 25 | 5 | 5 | 1.15120 |
| 26 | 5 | 6 | 1.28572 |
| 27 | 6 | 1 | 0.24060 |
| 28 | 6 | 2 | 0.44504 |
| 29 | 6 | 3 | 0.41951 |
| 30 | 6 | 4 | 0.86401 |
| 31 | 6 | 5 | 0.50351 |
| 32 | 6 | 6 | 0.68632 |