| Table 6: Results of ANOVA for hardness. |
| | Source | DOF | SS | MS | | % Contribution |
| | 2 | 0.2181 | 0.1091 | 0.19 | 1.11 | | 2 | 1.8397 | 0.9198 | 1.59b | 9.39 | | 2 | 1.1229 | 0.5614 | 0.97 | 5.73 | | 2 | 7.4516 | 3.7258 | 6.43b | 38.04 | | 4 | 0.9313 | 0.2328 | 0.40 | 4.75 | | 4 | 2.5656 | 0.6414 | 1.11 | 13.09 | | 4 | 1.9769 | 0.4942 | 0.85 | 10.09 | | Error | 6 | 3.4792 | 0.5799 | | |
| | Total | 26 | 19.5853 | | | |
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bSignificant factors and interactions ; .
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