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https://doi.org/10.1080/03610928408828776

has been cited by the following article:

• TITLE: Inference Procedures on the Generalized Poisson Distribution from Multiple Samples: Comparisons with Nonparametric Models for Analysis of Covariance (ANCOVA) of Count Data

  AUTHORS: Maha Al-Eid, Mohamed M. Shoukri

  KEYWORDS: Count Regression, Over Dispersion, Generalized Linear Models, Analysis of Covariance, Generalized Additive Models

  JOURNAL NAME: Open Journal of Statistics, Vol.11 No.3, June 25, 2021

  ABSTRACT: Count data that exhibit over dispersion (variance of counts is larger than its mean) are commonly analyzed using discrete distributions such as negative binomial, Poisson inverse Gaussian and other models. The Poisson is characterized by the equality of mean and variance whereas the Negative Binomial and the Poisson inverse Gaussian have variance larger than the mean and therefore are more appropriate to model over-dispersed count data. As an alternative to these two models, we shall use the generalized Poisson distribution for group comparisons in the presence of multiple covariates. This problem is known as the ANCOVA and is solved for continuous data. Our objectives were to develop ANCOVA using the generalized Poisson distribution, and compare its goodness of fit to that of the nonparametric Generalized Additive Models. We used real life data to show that the model performs quite satisfactorily when compared to the nonparametric Generalized Additive Models.