title: A score test for zero inflation in a Poisson distribution.
abstract: When analyzing Poisson-count data sometimes a lot of zeros are observed. When there are too many zeros a zero-inflated Poisson distribution can be used. A score test is presented to test whether the number of zeros is too large for a Poisson distribution to fit the data well.
authors.affiliation: Center for Biostastics, University of Utrecht, The Netherlands.
authors.forename: J
authors.initials: J
authors.lastname: van den Broek
mesh_terms: D018791:CD4 Lymphocyte Count; D015658:HIV Infections / Q000150:complications* / Q000276:immunology; D006801:Humans; D008297:Male; D008433:Mathematics; D015233:Models, Statistical; D016012:Poisson Distribution; D011336:Probability; D014552:Urinary Tract Infections / Q000150:complications / Q000453:epidemiology*