Results 251 to 260 of about 15,347,884 (286)

The beta-binomial model for estimating heritabilities of binary traits

Theoretical and Applied Genetics, 1995
Calculations of individual narrow-sense heritability and family mean heritability of a binary trait in stochastically simulated sib trials in completely randomized block experiments showed that in some situations estimates of "realized" heritabilities obtained from the mixed linear threshold model could be improved by application of a proposed beta ...
Magnussen, S., Kremer, Antoine
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A BETA-BINOMIAL MODEL FOR ESTIMATING THE SIZE OF A HETEROGENEOUS POPULATION

Australian <html_ent glyph="@amp;" ascii="&amp;"/> New Zealand Journal of Statistics, 2005
Summary This paper compares the properties of various estimators for a beta-binomial model for estimating the size of a heterogeneous population. It is found that maximum likelihood and conditional maximum likelihood estimators perform well for a large population with a large capture proportion.
Arnold, R, Yip, PSF, Liqun, XI, Hayakawa, YU   +3 more
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Local Efficiency of Moment Estimators in Beta-Binomial Model

Communications in Statistics - Theory and Methods, 1993
In this paper, the beta-binomial model is introduced as a Markov chain. It is shown that the correlated binomial model of Kupper and Haseman (1978) is identical to the additive binomial model of AItham(1978) and both are a first order approximation of the beta-binomial model. For small γ, the local efficiency of the moment estimators for the mean ρ and
Yanhong Wu, M S Srivastava
exaly   +2 more sources

Bayesian Estimation and Prediction for the Beta-Binomial Model

Journal of Business & Economic Statistics, 1987
The beta-binomial distribution, which is generated by a simple mixture model, has been widely applied in the social, physical, and health sciences. Problems of estimation, inference, and prediction have been addressed in the past, but not in a Bayesian framework.
Jack C. Lee, Darius J. Sabavala
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A Review of the Beta-Binomial Model and its Extensions

Journal of Educational Statistics, 1981
Both the binomial and beta-binomial models are applied to various problems occurring in mental test theory. The paper reviews and critiques these models. The emphasis is on the extensions of the models that have been proposed in recent years, and that might not be familiar to many educators.
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The Beta-Binomial Model for Consumer Purchasing Behaviour

Applied Statistics, 1970
A model for consumer purchasing behaviour is proposed which is based on the beta-binomial distribution. The model is tested for several nondurable consumer products, and the results give insight into discrepancies from a previously used model based on the negative binomial distribution (NBD).
C. Chatfield, G. J. Goodhardt
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Beta-Binomial Kriging: An Improved Model for Spatial Rates

Procedia Environmental Sciences, 2015
AbstractThis paper will present an alternative approach to modelling spatially correlated proportions called beta-binomial kriging. The model adjusts a simpler model, binomial cokriging, to more accurately model latent beta spatial random fields as a function of observed sample proportions.
David Marx
exaly   +2 more sources

An Estimator of Species Overlap Using a Modified Beta-Binomial Model

Biometrics, 1996
A new species overlap measure is defined as the probability that, given a randomly selected species is present in at least one of the two communities, it is present in both communities. This measure can be thought of as a community analog of the Jaccard index for species overlap between two samples.
Smith, Woollcott, Solow, Andrew R., Preston, Peter E.   +2 more
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Beta‐binomial/Poisson regression models for repeated bivariate counts

Statistics in Medicine, 2008
AbstractWe analyze data obtained from a study designed to evaluate training effects on the performance of certain motor activities of Parkinson's disease patients. Maximum likelihood methods were used to fit beta‐binomial/Poisson regression models tailored to evaluate the effects of training on the numbers of attempted and successful specified manual ...
Mayra Ivanoff, Lora, Julio M, Singer
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Das Beta-Binomial-Modell

1997
Die Beta-Verteilung ist die konjugierte a-priori Verteilung im Binomialmo-dell, bzw. der Bayes’schen Schatzung eines Anteils.
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