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The signal-to-noise (S/N) ratio values for each level of the parameters.
| Factor | Level 1 | Level 2 | Level 3 | Level 4 |
|---|---|---|---|---|
| Cement (kg/m3) | 57.44 | 51.20 | 63.84 | 67.10 |
| CDG (kg/m3) | 56.71 | 57.65 | 63.20 | 65.42 |
| Water to materials ratio | 56.64 | 57.02 | 62.54 | 65.18 |
| Fine content (%) | 59.40 | 62.91 | 62.54 | 58.07 |
| Gravel content (%) | 63.00 | 61.91 | 55.22 | 59.98 |
