Table 4.

Group comparisons of microhardness variation.

KHN Variation Comparison	p
G1 × G4	.4736 a
G2 × G5	.0052 a
G3 × G6	.2127 a
G1 × G2 × G3	.9335 b
G4 × G5 × G6	.2551 b

^aStudent’s t-test with Welch’s correction for independent samples.

^bOne-way ANOVA