Table 6: Multiple comparison: Tukey test of zones of bacterial growth inhibition of ZOE against four bacterial strains

										95% confidence interval
Microorganisms				Mean difference		Std. error		p-value		Lower bound		Upper bound
S. aureus		E. coli		–3.00000		0.55377		0.0001, S		–4.62		–1.37
		E. faecalis		5.16667		0.55377		0.0001, S		3.54		6.79
		P. aeruginosa		5.66667		0.55377		0.0001, S		4.04		7.29
E. coli		E. faecalis		8.16667		0.55377		0.0001, S		6.54		9.79
		P. aeruginosa		8.66667		0.55377		0.0001, S		7.04		10.29
E. faecalis		P. aeruginosa		0.50000		0.55377		0.893, NS		–1.12		2.12

NS: Not significant; S: Significant