| Pure Sample | Contaminated Sample | |||
% |
|
|
|
|
|
0.2 | coef. | 0.55 | 0.52 | 0.55 | 0.52 |
| (s.e.) | (0.28) | (0.14) | (0.28) | (0.14) |
3 | coef. | 0.50 | 0.51 | 0.50 | 0.51 |
| (s.e.) | (0.27) | (0.14) | (0.25) | (0.13) |
10 | coef. | 0.50 | 0.52 | 0.51 | 0.21 |
| (s.e.) | (0.29) | (0.14) | (0.23) | (0.42) |
20 | coef. | 0.50 | 0.50 | 0.50 | -0.13 |
| (s.e.) | (0.27) | (0.13) | (0.15) | (0.89) |
25 | coef. | 0.48 | 0.51 | 0.51 | -0.16 |
| (s.e.) | (0.27) | (0.14) | (0.15) | (0.93) |
30 | coef. | 0.51 | 0.53 | 0.22 | -0.17 |
| (s.e.) | (0.27) | (0.14) | (0.40) | (0.94) |