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Table 2 Regression coefficients of the predicted quadratic polynomial model for response variables Y (FFA%).

From: Hydrolysis optimization and characterization study of preparing fatty acids from Jatropha curcasseed oil

Variables Coefficients (ß) % FFA (Y) T P Notability
Intercept 96.65 144.21 0.0001 ***
Linear     
X 1 17.28 889.81 0.0001 ***
X 2 4.33 57.02 0.0001 ***
X 3 1.91 9.52 0.0150 **
Square     
X 11 -15.14 130.05 0.0001 ***
X 22 0.37 0.085 0.7777  
X 33 0.63 0.33 0.5838  
Interaction     
X 12 -3.48 30.63 0.0006 ***
X 13 -1.40 4.02 0.0800  
X 23 0.11 0.023 0.8825  
R 2 0.99    
  1. Notes: ** P < 0.05; *** P < 0.01. T: F test value
  2. See Table 1 for a description of the abbreviations