Table 1.
Descriptive statistics of concrete compressive strength and key factors in Dataset 1.
| Parameters | Descriptive indicators | ||||||
|---|---|---|---|---|---|---|---|
| Mean | Median | Standard deviation | Variance | Minimum | Maximum | Skewness | |
| Cement (kg m−3) | 281.17 | 272.90 | 104.46 | 10,910.98 | 102.00 | 540.00 | 0.51 |
| Slag (kg m−3) | 73.90 | 22.00 | 86.24 | 7436.90 | 0.00 | 359.40 | 0.80 |
| Ash (kg m−3) | 54.19 | 0.00 | 63.97 | 4091.64 | 0.00 | 200.10 | 0.54 |
| Water (kg m−3) | 181.57 | 185.00 | 21.34 | 455.56 | 121.80 | 247.00 | 0.07 |
| Superplastic (kg m−3) | 6.20 | 6.40 | 5.97 | 35.65 | 0.00 | 32.20 | 0.91 |
| Coarse aggregate (kg m−3) | 972.92 | 968.00 | 77.72 | 6039.81 | 801.00 | 1145.00 | -0.04 |
| Fine aggregate (kg m−3) | 773.58 | 779.50 | 80.14 | 6421.95 | 594.00 | 992.60 | -0.25 |
| Age (d) | 45.66 | 28.00 | 63.14 | 3986.56 | 1.00 | 365.00 | 3.26 |
| Strength (MPa) | 35.82 | 34.45 | 16.70 | 278.81 | 2.33 | 82.60 | 0.42 |