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The size of not ruled out yet (NROY) space (as a percentage of the original space) after Wave 4, for when only regression emulators have been used and for when a Gaussian process has always been used
| Function | Regression | Gaussian process |
|---|---|---|
| 1 (10d) | 7.410% | 2.525% |
| 2 (10d) | 1.326% | 0.387% |
| 3 (20d) | 3.913% | 1.596% |
| Borehole | 1.308% | 0.258% |
