| Table 10. Estimated observation SDs. | |||
| Index | Fleet number | Age | Estimate |
| 1 | 1 | 1 | 0.70900 |
| 2 | 1 | 2 | 0.32213 |
| 3 | 1 | 3 | 0.16036 |
| 4 | 1 | 4 | 0.23174 |
| 5 | 1 | 5 | 0.08637 |
| 6 | 1 | 6 | 0.24399 |
| 7 | 1 | 7 | 0.64109 |
| 8 | 2 | 1 | 0.71972 |
| 9 | 2 | 2 | 0.71972 |
| 10 | 2 | 3 | 0.71972 |
| 11 | 2 | 4 | 0.71972 |
| 12 | 2 | 5 | 0.71972 |
| 13 | 2 | 6 | 0.71972 |
| 14 | 3 | 1 | 0.72827 |
| 15 | 3 | 2 | 0.72827 |
| 16 | 3 | 3 | 0.72827 |
| 17 | 4 | 1 | 0.78242 |
| 18 | 4 | 2 | 0.78242 |
| 19 | 4 | 3 | 0.78242 |
| 20 | 4 | 4 | 0.78242 |
| 21 | 5 | 1 | 0.90895 |
| 22 | 5 | 2 | 0.90895 |
| 23 | 5 | 3 | 0.90895 |
| 24 | 5 | 4 | 0.90895 |
| 25 | 5 | 5 | 0.90895 |
| 26 | 5 | 6 | 0.90895 |
| 27 | 6 | 1 | 0.58541 |
| 28 | 6 | 2 | 0.58541 |
| 29 | 6 | 3 | 0.58541 |
| 30 | 6 | 4 | 0.58541 |
| 31 | 6 | 5 | 0.58541 |
| 32 | 6 | 6 | 0.58541 |