Table 4.

Descriptive analysis of the Ra values (nm) of investigator 2 and trial two achieved by the specific practitioner groups

Statistical Characteristics	Ra (nm)
	Students	Dentists > 2	Dentists < 2	Technicians
25th Percentile	3.69	9.49	5.20	14.24
50th Percentile	8.28	28.13	16.02	18.96
75th Percentile	22.38	58.78	29.15	47.40
Minimum	3.17	5.90	1.44	12.18
Maximum	36.66	78.76	52.25	89.53
Median	8.28	28.13	16.02	18.69