Combination of Chemically-Characterized Essential Oils from Eucalyptus polybractea, Ormenis mixta, and Lavandula burnatii: Optimization of a New Complete Antibacterial Formulation Using Simplex-Centroid Mixture Design

Table 4

Variance analysis for the three fitted models.

Models	E. coli					S. aureus
	DF	SS	MS	F	value	DF	SS	MS	F	value
R	6	25.486212	4.24770	117.6945		6	0.125	0.021	29.41
r	5	0.180455	0.03609			5	0.004	0.001
LOF	3	0.190	0.06015	14.32	0.07	3	0.0036	0.00122	12.2	0.051
PE	2	0.00012	0.0042			2	0.0001	0.0001
Total	11	25.666667				11	0.129
R^2	99%					97%
	98%					93%
	85%					42%

R: regression; r: residual; LOF: lack of fit; PE: pure error; R²: coefficient of determination; adj: adjusted; pred: predicted; DF: degrees of freedom; SS: sum of squares; MS: mean square; statistically significant.