Shin Zhu SimRamesh C. GuptaSeng Huat Ong2025-01-082025-01-082018-01-0910.1515/ijb-2016-0070https://dspace-cris.utar.edu.my/handle/123456789/10706In this paper, we study the zero-inflated Conway-Maxwell Poisson (ZICMP) distribution and develop a regression model. Score and likelihood ratio tests are also implemented for testing the inflation/deflation parameter. Simulation studies are carried out to examine the performance of these tests. A data example is presented to illustrate the concepts. In this example, the proposed model is compared to the well-known zero-inflated Poisson (ZIP) and the zero- inflated generalized Poisson (ZIGP) regression models. It is shown that the fit by ZICMP is comparable or better than these models.journal-article