Table 3 Descriptive statistics of the variables.
ID No.: variables | Category | Unit | Range | Mean | Standard deviation | Kurtosis | Skewness |
|---|---|---|---|---|---|---|---|
X1: Cement | Input for Y1 & Y2 | g | 275–500 | 387.50 | 83.85 | -1.36 | 0.00 |
X2: Fly ash | Input for Y1 & Y2 | g | 0–225 | 112.50 | 83.85 | -1.36 | 0.00 |
X3: Molecular weight | Input for Y1 & Y2 | kg/mol | 23–71 | 46.44 | 14.35 | -0.48 | -0.26 |
X4: Main chain length | Input for Y1 & Y2 | - | 10–40 | 22.56 | 8.00 | 0.39 | 0.82 |
X5: Side chain length | Input for Y1 & Y2 | g/mol | 1000–3000 | 2222.22 | 695.67 | -0.51 | -0.89 |
X6: Curing time | Input for Y1 | day | 1–90 | 25.80 | 33.51 | -0.15 | 1.24 |
X7: Flow time | Input for Y2 | minute | 0–60 | 30.00 | 21.21 | -1.303 | 0.00 |
Y1: Compressive strength | Output of Y1 | MPa | 1.8–57.7 | 21.967 | 2.463 | 0.280 | 1.133 |
Y2: Flow value | Output of Y2 | cm | 18.3–28.5 | 21.968 | 2.607 | -0.089 | 1.007 |
