Table 2.

Results of t-test comparing the average value of nanohardness in groups A and B.

	Group A	Group B
HVIT (MPa: mean value ± SD)	404.62 ± 40.3	323.18 ± 8.7
p (intragroup analysis)	0.03258	0.006258
t value	−7.01238
p (intergroup analysis)	0.00
E IT (GPa: mean value ± SD)	44,72 ± 1,0	42,73 ± 1.8
p (intragroup analysis)	0.01246	0.00246
t value	3,70801
p (intergroup analysis)	0.000996

p: the level of significance, t value: the difference coefficient, and SD: standard deviation.