Table 2.
ANOVA analysis of central composite design for optimizing ascorbic acid extraction from rugosa rose fruit

Source	Sum of squares	Degree of freedom	Mean square	f-value	p-value
Model	8.50	5	1.70	13.96	0.0016	Significant
Aa	0.05	1	0.05	0.40	0.5495
Bb	2.02	1	2.02	16.55	0.048
AB	0.00	1	0.00	0.00	1.000
A^2	0.33	1	0.33	2.70	0.1443
B^2	6.38	1	6.38	52.34	0.0002
Residual	0.85	7	0.12
Lack of Fit	0.70	3	0.23	6.34	0.0532	Not significant
Pure Error	0.15	4	0.04
Cor. Totalc	9.36	12
SDd	0.35		R2	0.908841
Mean	5.80		Adj R2	0.843727

Temperature
Time
Total all information corrected for the mean
Standard deviation