Table 5.
Coefficients of the fitted model.
| Predictor | Regression Coefficient | Standard Error | t-Value, df = 9 |
p-Value | −95% Confidence Interval |
+95% Confidence Interval |
|---|---|---|---|---|---|---|
| Intercept | 1.206468 | 0.354637 | 3.401978 | 0.007849 | 0.404223 | 2.008712 |
| pH (L) | −0.059897 | 0.065887 | −0.909076 | 0.387006 | −0.208944 | 0.089151 |
| pH (Q) | 0.012988 | 0.009269 | 1.401202 | 0.194681 | −0.007980 | 0.033957 |
| K2FeO4 (L) | −4.423640 | 1.263080 | −3.502263 | 0.006700 | −7.280926 | −1.566353 |
| K2FeO4 (Q) | 5.750741 | 2.085576 | 2.757387 | 0.022207 | 1.032839 | 10.468642 |
| Time (L) | −0.006018 | 0.025262 | −0.238234 | 0.817035 | −0.063164 | 0.051128 |
| Time (Q) | 0.000073 | 0.000834 | 0.087398 | 0.932269 | −0.001814 | 0.001960 |
df-degree of freedom.