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Main effect of each variable.
| Variable | Values | Main effect | |
|---|---|---|---|
| (∑+1)/n (+1) | (∑−1)/n (−1) | ∑(+1)/n (+1) − ∑(−1)/n (−1) | |
| SDS | 55 | 56.66667 | −1.66667 |
| H2O2 | 63.33333 | 48.33333 | 15 |
| CaCO3 | 50 | 61.66667 | −11.6667 |
| NaOH | 25 | 86.66667 | −61.6667 |
| Shaking rate/temperature | 51.66667 | 59.83333 | −8.16667 |
