نتایج جستجو برای: overdispersion

تعداد نتایج: 555  

2015
Marcelo Freire Moro Igor Aurélio Silva Francisca Soares de Araújo Eimear Nic Lughadha Thomas R. Meagher Fernando Roberto Martins

Seasonally dry tropical plant formations (SDTF) are likely to exhibit phylogenetic clustering owing to niche conservatism driven by a strong environmental filter (water stress), but heterogeneous edaphic environments and life histories may result in heterogeneity in degree of phylogenetic clustering. We investigated phylogenetic patterns across ecological gradients related to water availability...

Journal: :Frontiers in virology 2022

Corrigendum on: Ghafari M, Liu Q, Dhillon A, Katzourakis A and Weissman DB (2022) Investigating the evolutionary origins of first three SARS-CoV-2 variants concern. Front. Virol. 2:942555. doi: 10.3389/fviro.2022.942555 In published article, there was an error in figure 3B 5A captions. 3A, instead "Only 1.2% 3.8% dynamics corresponding to overdispersion k=0.005 k=0.001 fall inside enclosed area...

Journal: :Earthline Journal of Mathematical Sciences 2023

A new mixed Poisson model is proposed as a better alternative for modelling count data in the presence of overdispersion and/or heavy-tail. The mathematical properties were derived. maximum likelihood estimation method employed to estimate model’s parameters and its applications three real sets discussed. used frequencies that have been different literature on subject. results compared with Poi...

Journal: :Sainmatika 2023

Filariasis occurs as a result of parasitic infection by mosquito vector. affects the lymph and causes blood loss in body. is uncured. Therefore, prevention measures are needed to reduce number deaths. generally does not cause death directly rarely occurs. However, this results an excess zeros data, which overdispersion. The data used were obtained from book Indonesia Health Profile 2021, covers...

2008
Gudeta Sileshi

Recent studies show that soil animal count data are characterized by the presence of excess zeros and overdispersion, which violate the assumptions of standard statistical tests. Despite this, analyses have consisted of mainly non-parametric tests and log-normal least square regression (i.e. ANOVA). Failure to accommodate zero inflation in count data can result in biased estimation of ecologica...

2015
John E. Ash Yajie Zou Yinhai Wang

1 2 A major focus for transportation safety analysts is the development of crash prediction models, a 3 task for which an extremely wide selection of model types are available. Perhaps the most common 4 crash prediction model is the negative binomial (NB) regression model. The NB model gained 5 popularity due to its relative ease of implementation and its ability to handle overdispersion in 6 c...

Journal: :Computers & Geosciences 2011
Rachel Lowe Trevor C. Bailey David B. Stephenson Richard J. Graham Caio A. S. Coelho Marilia Sá Carvalho Christovam Barcellos

This paper considers the potential for using seasonal climate forecasts in developing an early warning system for dengue fever epidemics in Brazil. In the first instance, a generalised linear model (GLM) is used to select climate and other covariates which are both readily available and prove significant in prediction of confirmed monthly dengue cases based on data collected across the whole of...

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