P__disp: A function to calculate Pearson Chi2 and its dispersion statistic following glm and glm.nb.
Description
This function calculates Pearson Chi2 statistic and the
Pearson-based dipersion statistic. Values of the dispersion greater
than 1 indicate model overdispersion. Values under 1 indicate
under-dispersion.
Usage
P__disp(x)
Arguments
x
the fitted model.
Value
pearson.chi2
Pearson Chi2 value.
dispersion
Pearson-basde dispersion.
Details
To be used following glm and glm.nb functions.
References
Hilbe, J.M., and Robinson, A.P. 2013. Methods of Statistical Model Estimation. Chapman & Hall / CRC.