chi2cub1cov: Pearson $X^2$ statistic for CUB models with one discrete covariate for feeling
Description
Compute the $X^2$ statistic of Pearson for the goodness of fit of a CUB model for ordinal responses, where the feeling parameter
is explained via a logistic transform of the only discrete covariate. It groups ratings in
classes according to the values of the covariate.
Usage
chi2cub1cov(m, ordinal, covar, pai, gama)
Arguments
m
Integer: number of ordinal categories
ordinal
Vector of ordinal responses
covar
Vector of the selected covariate for explaining the feeling component
Value
It returns the following results in a list:
- df
- Number of degrees of freedom
- chi2
- Value of the Pearson fitting measure
- dev
- Deviance indicator
References
Tutz, G. (2011). Regression for categorical data, Cambridge Series in Statistical
and Probabilistic Mathematics