Table 6: ANOVA for response surface quadratic model for intercept.

FactorCoefficient estimateDfStandard error95% CI
Low
95% CI
High
VIF

Yield
Intercept23.7210.5322.3725.07
2.3710.321.543.201.0
10.321.00
10.322.631.00
10.463.281.00
10.460.721.00
10.463.381.00
10.472.261.01
10.471.451.01
10.470.861.01

Total polyphenol content
Intercept430.23113.44464.77
50.4118.231.00
6.7218.231.00
0.8018.231.00
16.41111.641.00
0.96111.641.00
127.66111.641.00
154.03112.111.01
41.82112.111.01
59.01112.111.01

Total antioxidant activity
Intercept22.2210.5020.9223.52
1.3010.311.00
0.4810.311.00
1.2510.311.00
0.4410.441.00
0.8010.441.00
0.9910.441.00
5.1610.451.01
3.6810.451.01
2.9510.451.01