Table 6: Results of ANOVA for hardness.

SourceDOFSSMS % Contribution

20.21810.10910.191.11
21.83970.91981.59b9.39
21.12290.56140.975.73
27.45163.72586.43b38.04
40.93130.23280.404.75
42.56560.64141.1113.09
41.97690.49420.8510.09
Error63.47920.5799

Total2619.5853

bSignificant factors and interactions ; .