Table 5.

Values and significance of regression coefficients for lipophilic kojic acid derivative reaction (quadratic model).

Coefficients of Models	Yield (%)
	Value	Prob > F
Intercept	53.53	-
X1	9.05	<0.0001 a
X2	6.25	<0.0001 a
X3	4.57	0.0020 a
X4	2.71	0.0473 a
X2 X3	3.37	0.0441 a
X2 X4	−5.46	0.0024 a
X3 X4	4.12	0.0163 a
X22	−5.45	0.0002 a
X32	−4.13	0.0022 a

^a Significant at “Prob > F” of less than 0.05; Where; X₁ = Substrate ratio, X₂ = Enzyme amount, X₃ = Temperature, X₄ = Reaction time.