Table 2. Descriptive analysis of parameters.
| Parameters/description | Mean | Standard deviation | Variance | Skewness | Kurtosis | Minimum | 1st Quartile (Q1) | Median | 3rd Quartile (Q3) | Maximum |
|---|---|---|---|---|---|---|---|---|---|---|
| GTC dose (wt%) | 7.1 | 6.1 | 37.6 | 1.0 | 0.1 | 0.0 | 2.0 | 6.0 | 10.0 | 20 |
| pH | 6.0 | 3.4 | 11.7 | 0.0 | −1.3 | 1.0 | 3.0 | 6.0 | 9.0 | 11 |
| IDC (mg L−1) | 30.0 | 14.1 | 200.1 | 0.0 | −1.3 | 10.0 | 20.0 | 30.0 | 40.0 | 50 |
| Reaction time (min) | 45.0 | 22.9 | 525.3 | 0.0 | −1.2 | 10.0 | 25.0 | 45.0 | 65.0 | 80 |
| RB5 removal (%) | 71.7 | 13.2 | 174.6 | −0.6 | 0.2 | 21.2 | 63.6 | 73.2 | 81.3 | 100 |