| Design | Unequal inclusion probabilities | |||||
| Relative RMSE | Efficiency gain | |||||
| n = 50 | n = 75 | n = 100 | n = 50 | n = 75 | n = 100 | |
| RPM | 0.4580 | 0.4343 | 0.4255 | |||
| LPM1 | 0.2399 | 0.1298 | 0.0142 | 47.61% | 70.12% | 96.67% |
| LPM1 (linear calibration) | 0.2759 | 0.1609 | 0.0712 | 39.76% | 62.95% | 83.26% |
| LPM1 (quadratic calibration) | 0.2933 | 0.1744 | 0.0875 | 35.97% | 59.83% | 79.44% |
| LPM2 | 0.2398 | 0.1299 | 0.0142 | 47.64% | 70.08% | 96.66% |
| LPM2 (linear calibration) | 0.2774 | 0.1617 | 0.0716 | 39.43% | 62.77% | 83.18% |
| LPM2 (quadratic calibration) | 0.2951 | 0.1745 | 0.0876 | 35.56% | 59.82% | 79.40% |
| SCPS | 0.2406 | 0.1297 | 0.0139 | 47.46% | 70.14% | 96.73% |
| SCPS (linear calibration) | 0.2802 | 0.1619 | 0.0704 | 38.82% | 62.72% | 83.47% |
| SCPS (quadratic calibration) | 0.3005 | 0.1775 | 0.0875 | 34.39% | 59.14% | 79.43% |
| BS (linear balancing) | 0.2397 | 0.1316 | 0.0139 | 47.66% | 69.69% | 96.73% |
| BS (quadratic balancing) | 0.2388 | 0.1325 | 0.0142 | 47.85% | 69.50% | 96.67% |
| DBSS (linear balancing) | 0.2350 | 0.1280 | 0.0139 | 48.70% | 70.53% | 96.74% |
| DBSS (quadratic balancing) | 0.2365 | 0.1300 | 0.0138 | 48.36% | 70.06% | 96.76% |