Table 1.
Model parameters and statistical assumptions for WPNI and HMF
| Parameter | WPNIa (mg WPN mL−1) | HMFb (µmol L−1) |
|---|---|---|
| Slope | − 4.41 (± 0.23) | 0.00996 (± 0.0001) |
| Intercept | 93.92 (± 1.17) | 0.00091 (± 0.0018) |
| LOFc | 0.30 (3.26)* | 0.77 (3.26)* |
| SIGd | 343 (4.49)* | 4138 (4.49)* |
| R2 adjusted | 0.95 | 0.99 |
Residual normality (Shapiro–Wilk test): ap = 0.063; bp = 0.915. Homoscedasticity (Cochran test): aCcalc = 0.11 (Ccrit = 0.62); bCcalc = 0.21 (Ccrit = 0.62)
*Critical values in parentheses, where: cLOF (lack of fit): Fcrit (ν1 = 4, ν2 = 12); dSIG (regression significance): Fcrit (ν1 = 1, ν2 = 16). Where ν1: numerator degree of freedom (LOF: m − p; SIG: p − 1) and ν2: denominator degree of freedom (LOF: n − m; SIG: n − p), where p: number of parameters, m: number of levels, n: number of observations. 95% confidence interval