Saponification of Jatropha curcas Seed Oil: Optimization by D-Optimal Design

Table 4

Analysis of variance (ANOVA) of the response 𝑌 for FFA%.

Source	Df^a	Sum of squares	Mean square	𝐹-value^b	Prob>𝐹
Model	9	5592.97	621.44	84.70	<0.0001	Significant
Residual	8	58.70	7.34
Lack-of-fit	4	20.45	5.11	0.53	0.7205	Not significant
Pure error	4	38.25	9.56

^aDf: degree freedom; ^b𝐹-value: distribution.