disp_test {sdlrm} | R Documentation |
Test for Constant Dispersion in the Modified Skew Discrete Laplace Regression
Description
Hypothesis test on constant dispersion in the modified skew discrete Laplace regression.
Usage
disp_test(object)
Arguments
object |
an object of class |
Value
the function disp_test
returns the values and corresponding asymptotic
p-values of the score, Wald, likelihood ratio, and gradient test statistics
References
Medeiros, R. M. R., and Bourguignon, M. (2025). Modified skew discrete Laplace regression models for integer valued data with applications to paired samples. Manuscript submitted for publication.
Examples
## Data set: pss (for description run ?pss)
barplot(table(pss$difference), xlab = "PSS index difference", ylab = "Frequency")
boxplot(pss$difference ~ pss$group, xlab = "Group", ylab = "PSS index difference")
## Fit a double model (mode = 1)
fit0 <- sdlrm(difference ~ group | group, data = pss, xi = 1)
## Constant dispersion test
disp_test(fit0)
[Package sdlrm version 0.1.2 Index]