. 2013 Jul 2;18(7):7699–7710. doi: 10.3390/molecules18077699

Table 2.

Regression coefficients, R², adjusted R² and probability values for the final reduced models.

Regression coefficients	Coefficients	F-ratio	P-value
β₀	20.6923	44.42	0.000^b
β₁	−0.1490	2.84	0.138
β₂	−0.6854	57.35	0.000^b
β₁₁	0.0028	10.89	0.011^b
β₂₂	0.0059	47.83	0.000^b
β₁₂	-	-	-
R²	91.5%	21.64 (Regression)	0.000 (Regression)
R²-adj	87.3%	21.64 (Regression)	0.000 (Regression)

β₀ is a constant, β_i, β_ii and β_ij are the linear, quadratic and interaction coefficients of the quadratic polynomial equation, respectively. 1: Concentration of ascorbic acid 2: Concentration of α-tocopherol; ^b Significant (p < 0.05).