Results 51 to 60 of about 373,626 (232)

Spatial Distribution and Architecture of Acromyrmex landolti Forel (Hymenoptera, Formicidae) Nests in Pastures of Southwestern Bahia, Brazil

open access: yesSociobiology, 2013
Ants of the genera Atta and Acromyrmex (Myrmicinae: Attini) are in general pests for agricultural and pasture areas. In southwestern Bahia pastures, in Brazil, Acromyrmex landolti Forel occurs at intermediate densities of 260 nests ha-1.
Milton Rodrigues da Silva Júnior   +5 more
doaj   +3 more sources

On the Accuracy of the Generalized Gamma Approximation to Generalized Negative Binomial Random Sums

open access: yesMathematics, 2021
We investigate the proximity in terms of zeta-structured metrics of generalized negative binomial random sums to generalized gamma distribution with the corresponding parameters, extending thus the zeta-structured estimates of the rate of convergence in ...
Irina Shevtsova, Mikhail Tselishchev
doaj   +1 more source

Characterizations of Continuous Binomial and Negative Binomial Mixtures

open access: yesBiometrical Journal, 1984
AbstractCharacterizations are given for binomial (n, ϑ) and negative binomial (k, ϑ) mixtures in terms of the regression function of the mixing random variableYon the mixture variableX.In both casesYis the parameter ϑ and the mixing distribution is a continuous distribution on (0, 1) and on (0, ∞) respectively. Biological applications are indicated.
openaire   +3 more sources

Migraine day frequency in migraine prevention: longitudinal modelling approaches

open access: yesBMC Medical Research Methodology, 2019
Background Health economic models are critical tools to inform reimbursement agencies on health care interventions. Many clinical trials report outcomes using the frequency of an event over a set period of time, for example, the primary efficacy outcome ...
Gian Luca Di Tanna   +7 more
doaj   +1 more source

An Overview of Modern Applications of Negative Binomial Modelling in Ecology and Biodiversity

open access: yesDiversity, 2022
Negative binomial modelling is one of the most commonly used statistical tools for analysing count data in ecology and biodiversity research. This is not surprising given the prevalence of overdispersion (i.e., evidence that the variance is greater than ...
Jakub Stoklosa   +2 more
doaj   +1 more source

Goodness-of-Fit Test for the Bivariate Negative Binomial Distribution

open access: yesAxioms
When modeling real-world data, we face the challenge of determining which probability distribution best represents the data. To address this intricate problem, we rely on goodness-of-fit tests.
Francisco Novoa-Muñoz   +1 more
doaj   +1 more source

Nonparametric Bayesian Negative Binomial Factor Analysis

open access: yes, 2017
A common approach to analyze a covariate-sample count matrix, an element of which represents how many times a covariate appears in a sample, is to factorize it under the Poisson likelihood. We show its limitation in capturing the tendency for a covariate
Zhou, Mingyuan
core   +1 more source

A generalization of the negative binomial distribution

open access: yesJournal of Biostatistics and Epidemiology, 2017
Background & Aim: Consider a sequence of independent Bernoulli trials with p denoting the probability of success at each trial. With this definition, the probability that the nth success proceed by r failures follows the negative binomial distribution ...
Maryam Nazemipour, Mahmood Mahmoudi
doaj  

NBLDA: Negative Binomial Linear Discriminant Analysis for RNA-Seq Data

open access: yes, 2015
RNA-sequencing (RNA-Seq) has become a powerful technology to characterize gene expression profiles because it is more accurate and comprehensive than microarrays. Although statistical methods that have been developed for microarray data can be applied to
Dong, Kai   +3 more
core   +1 more source

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