Table 6.
Descriptive statistics of concrete compressive strength and key factors for Dataset 2.
| Parameters | Descriptive indicators | ||||||
|---|---|---|---|---|---|---|---|
| Mean | Median | Standard deviation | Variance | Minimum | Maximum | Skewness | |
| Cement (kg m−3) | 417.81 | 411 | 76.91 | 5914.77 | 284 | 600 | 0.41 |
| Water (kg m−3) | 170 | 170 | 8.16 | 66.67 | 160 | 180 | 0 |
| Superplastic (kg m−3) | 0.90 | 1.0 | 0.56 | 0.32 | 0.00 | 2.0 | 0.09 |
| Coarse aggregate (kg m−3) | 898.51 | 898.00 | 43.75 | 1914.08 | 845.00 | 989.00 | 0.02 |
| Fine aggregate (kg m−3) | 767.63 | 769.5 | 85.39 | 7291.25 | 552.00 | 951.00 | − 0.19 |
| Strength (MPa) | 51.93 | 48.90 | 9.43 | 88.95 | 37.5 | 73.6 | 0.44 |