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Table 3 Regression coefficient estimates for the quadratic polynomial model

From: Optimization of technology for dietary fiber extraction from Maixiansan by response surface methodology

Source Degrees of freedom Sum of squares Mean square F value P value
Model 9 9.91 1.10 113.21 < 0.0001
X1 1 0.078 0.078 8.02 0.0366
X 2 1 0.080 0.080 8.23 0.0351
X3 1 4.85 4.85 498.88 < 0.0001
X12 1 0.32 0.32 32.76 0.0023
X1*X2 1 0.0081 0.0081 0.83 0.4033
X1*X3 1 0.0012 0.0012 0.13 0.7371
X22 1 2.08 2.08 214.28 < 0.0001
X2*X3 1 0.0016 0.0016 0.16 0.7018
X32 1 3.05 3.05 313.54 < 0.0001
Lack of fit 3 0.005225 0.001742 0.08 0.9648