Table 4 Regression analysis on the viscosity of paste and color of ball-eomuk

Response	Model	F-value	p value	R2	Polynomial equation
Viscosity (Y1)	Quadratic	15.02	0.005	0.931)	18609 – 1453A2) – 3887B + 51.2A2 + 307B2 – 183AB
L(Y2)	Quadratic	4.88	0.053	0.83	53.63 + 0.053A – 0.98B – 0.00277A2 + 0.058B2 – 0.0336AB
a (Y3)	Quadratic	2.39	0.181	0.70	0.60 + 0.1728A + 0.231B – 0.00359A2 + 0.0108B2 - 0.00625AB
b (Y4)	Quadratic	7.25	0.024	0.75	8.07 + 0.1396A + 1.151B – 0.00177A2 – 0.0806B2 – 0.0125AB

¹⁾0≤R²≤1, close to 1 indicates regression line fits the model.
²⁾A: Rice starch content (X₁), B: Rice protein content (X₂)