Table 4.

Post hoc Tukey test for microhardness

Reference group	Comparison group	Mean difference	Std. error	Significance	95% confidence interval
					Lower bound	Upper bound
1	2	3.8467	2.60057	0.579	− 3.4353	11.1286
	3	− 1.3067	2.60057	0.987	− 8.5886	5.9753
	4	5.8111	2.60057	0.179	− 1.4709	13.0931
	5	− 4.3444	2.60057	0.459	− 11.6264	2.9375
2	3	− 5.1533	2.60057	0.286	− 12.4353	2.1286
	4	1.9644	2.60057	0.942	− 5.3175	9.2464
	5	− 8.1911*	2.60057	0.020	− 15.4731	− .9091
3	4	7.1178	2.60057	0.059	− .1642	14.3998
	5	− 3.0378	2.60057	0.769	− 10.3198	4.2442
4	5	− 10.1556*	2.60057	0.002	− 17.4375	− 2.8736

^*Based on observed means, the mean difference is significant at the.05 level (Values in bold indicate statistical significance)