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Table 2 ANOVA for response surface quadratic model

From: Ultrasound-assisted lipase-catalyzed synthesis of D-isoascorbyl palmitate: process optimization and Kinetic evaluation

Source Sum of squares df Mean square F -value p-value
Model 5292.98 14 378.07 20.67 < 0.0001**
A 481.91 1 481.91 26.35 0.0001**
B 2288.43 1 2288.43 125.12 < 0.0001**
C 292.92 1 292.92 16.02 0.0012**
D 1384.64 1 1384.64 75.71 < 0.0001**
AB 24.27 1 24.27 1.33 0.2674
AC 2.41 1 2.41 0.13 0.7219
AD 10.44 1 10.44 0.57 0.4616
BC 0.15 1 0.15 0.01 0.9301
BD 192.20 1 192.20 10.51 0.0055**
CD 0.05 1 0.05 0.00 0.9599
A2 106.51 1 106.51 5.82 0.0291*
B2 253.27 1 253.27 13.85 0.0020**
C2 244.59 1 244.59 13.37 0.0023**
D2 259.45 1 259.45 14.19 0.0019**
Residual 274.34 15 18.29   
Lack of fit 273.59 10 27.36 182.63 < 0.0001
Pure error 0.75 5 0.15   
Cor total 5567.33 29    
R-squared = 0.9570 Adj-squared = 0.9047 Ade precision = 16.756
  1. **Significant at 1% level *Significant at 5% level C.V. % = 6.36.