Table 2. Difference between tooth bleaching and tooth polishing.

			FACULTY								Total
			Dental Medicine		Medicine		Economics		Civil Engineering
	yes	freq.	36		37		29		22		124
		%	94.7%		92.5%		72.5%		55.0%		78.5%
	no	freq.	2		3		3		2		10
		%	5.3%		7.5%		7,5%		5.0%		6.3%
	don't know	freq.	0		0		8		16		24
		%	0%		,0%		20.0%		40.0%		15.2%
Total		freq.	38		40		40		40		158
		%	100.0%		100.0%		100.0%		100.0%		100,0%
Chi-Square Tests
	Value	d f
Pearson Chi-Square	34.293a	6