Coefficient

Oil loss (%)

Acid value

Peroxide value

Colour

b₀

8.57

11.900^***

2.000 ^*

0.8000

b₁

−0.061

0.150

−0.844^*

−0.325

b₂

−1.39^**

−0.953^*

0.162

−0.765

b₃

2.47^**

3.9 × 10⁻⁴

−0.460

−2.226^**

b₁₂

0.42

0.115

−0.144

−0.173

b₁₃

−0.87

0.817

−0.255

0.490

b₂₃

3.89^**

0.189

−0.501

−0.613

b₁₁

1.08

0.00

0.250

0.700

b₂₂

4.17^**

−0.867

−0.667

0.267

b₃₃

1.66

−0.484

0.167

1.686

R²

0.99

0.91

0.80

0.97

AAD

1.80

1.50

10.96

8.66