Я пытался выяснить, что на самом деле означает коэффициент фи, но я не очень успешен.
Call:
betareg(formula = Percentage ~ Total_testscore + Hours_Math_SE + Programme + Gender, data = starters[-225,
])
Standardized weighted residuals 2:
Min 1Q Median 3Q Max
-4.7046 -0.4828 0.0441 0.7116 2.1828
Coefficients (mean model with logit link):
Estimate Std. Error z value Pr(>|z|)
(Intercept) -1.02715 0.16976 -6.051 1.44e-09 ***
Total_testscore 0.03161 0.01428 2.214 0.02683 *
Hours_Math_SE 0.14295 0.02668 5.358 8.41e-08 ***
ProgrammeInt 0.23711 0.08623 2.750 0.00597 **
Genderfemale 0.07898 0.07873 1.003 0.31577
Phi coefficients (precision model with identity link):
Estimate Std. Error z value Pr(>|z|)
(phi) 13.426 1.191 11.28 <2e-16 ***
---
Signif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1
Type of estimator: ML (maximum likelihood)
Log-likelihood: 147.7 on 6 Df
Pseudo R-squared: 0.1788
Number of iterations: 12 (BFGS) + 2 (Fisher scoring)