Research Article
Optimization of Bi2O3, TiO2, and Sb2O3 Doped ZnO-Based Low-Voltage Varistor Ceramic to Maximize Nonlinear Electrical Properties
Table 3
ANOVA of quadratic model.
| Source | Sum of squares | Degree of freedom | Mean square | -value | value | Suggestion |
| Model | 100.24 | 9 | 11.14 | 28.79 | <0.0001 | Significant | | 2.89 | 1 | 2.89 | 7.47 | 0.0211 | — | | 20.30 | 1 | 20.30 | 52.46 | <0.0001 | Significant | | 0.55 | 1 | 0.55 | 1.41 | 0.2623 | — | | 0.018 | 1 | 0.018 | 0.046 | 0.8346 | — | | 0.14 | 1 | 0.14 | 0.37 | 0.5590 | — | | | | | | 0.9715 | — | | 10.30 | 1 | 10.30 | 26.62 | 0.0004 | Significant | | 23.70 | 1 | 23.70 | 61.24 | <0.0001 | Significant | | 54.58 | 1 | 54.58 | 141.06 | <0.0001 | Significant | Residual | 3.87 | 10 | 0.39 | | | | Lack of fit | 2.72 | 5 | 0.54 | 2.35 | 0.1846 | Not significant | Pure error | 1.15 | 5 | 0.23 | | | | Corrected total | 104.11 | 19 | | | | |
| -squared | 0.9628 | Standard deviation | 0.62 | | Adjusted 2 | 0.9294 | Coefficient of variation % | 9.84 | | Predicted 2 | 0.7793 | PRESS | 22.98 | | Adequate precision | 13.279 | | | | |
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