Results 31 to 40 of about 41,785 (303)

Tweedie gradient boosting for extremely unbalanced zero-inflated data [PDF]

Communications in Statistics - Simulation and Computation, 2020
Tweedie's compound Poisson model is a popular method to model insurance claims with probability mass at zero and nonnegative, highly right-skewed distribution. In particular, it is not uncommon to have extremely unbalanced data with excessively large proportion of zero claims, and even traditional Tweedie model may not be satisfactory for fitting the ...
He Zhou, Wei Qian, Yi Yang
openaire   +2 more sources

lyashevska/Mapping-Zero-Inflated-Data: v.1.0.0 [PDF]

<p><strong>Full Changelog</strong>: https://github.com/lyashevska/Mapping-Zero-Inflated-Data/compare/v1.0...v1.1</p> <p><strong>Full Changelog</strong>: https://github.com/lyashevska/Mapping-Zero-Inflated-Data ...
Olga Lyashevska
core   +1 more source

Zero inflated negative binomial-generalized exponential distributionand its applications [PDF]

Songklanakarin Journal of Science and Technology (SJST), 2014
In this paper, we propose a new zero inflated distribution, namely, the zero inflated negative binomial-generalized exponential (ZINB-GE) distribution. The new distribution is used for count data with extra zeros and is an alternative for data analysis
Sirinapa Aryuyuen, Winai Bodhisuwan, Thidaporn Supapakorn   +2 more
doaj  

Assessment and Selection of Competing Models for Zero-Inflated Microbiome Data. [PDF]

PLoS ONE, 2015
Typical data in a microbiome study consist of the operational taxonomic unit (OTU) counts that have the characteristic of excess zeros, which are often ignored by investigators.
Lizhen Xu, Andrew D Paterson, Williams Turpin, Wei Xu   +3 more
doaj   +1 more source

Performance of the Ridge and Liu Estimators in the zero-inflated Bell Regression Model

Journal of Mathematics, 2022
The Poisson regression model is popularly used to model count data. However, the model suffers drawbacks when there is overdispersion—when the mean of the Poisson distribution is not the same as the variance.
Zakariya Yahya Algamal, Adewale F. Lukman, Mohamed R. Abonazel, Fuad A. Awwad   +3 more
doaj   +1 more source

Comparison of the Performance of the Gradient and Newton-Raphson Method to Estimate Parameters in Some Zero-Inflated Regression Models

Journal of Advanced Engineering and Computation, 2020
This paper compares the performance of the gradient and Newton-Raphson (N-R) method to estimate parameters in some zero-inflated (ZI) regression models such as the zero-inflated Poisson (ZIP) model, zero-inflated Bell (ZIBell) model, zero-inflated ...
Kim-Hung Pho, Buu-Chau Truong
doaj   +1 more source

PENERAPAN REGRESI ZERO INFLATED GENERALIZED POISSON (ZIGP) PADA DATA OVERDISPERSION

E-Jurnal Matematika, 2019
Zero Inflated Generalized Poisson (ZIGP) is a regression model used to analyze Poisson distributed discrete data which contains mostly zero and tends to experience overdispersion (varians value greater than the mean value).
NI WAYAN AMANDA DEWI SULISTYANINGSIH, I KOMANG GDE SUKARSA, NI LUH PUTU SUCIPTAWATI   +2 more
doaj   +1 more source

A New Zero–Inflated Regression Model with Applications to Australian Health Survey and Biochemistry Graduate Students Data

Journal of Mathematics
In this study, we propose a new zero-inflated regression model as an alternative to zero-inflated regression models, such as the zero-inflated Poisson, zero-inflated negative binomial, zero-inflated hurdle-Poisson, and zero-inflated hurdle negative ...
Caner Tanış, Mahmoud M. Mansour, Enayat M. Abd Elrazik, Christophe Chesneau, Hazem Al-Mofleh, Ahmed Z. Afify   +5 more
doaj   +1 more source

Zero-inflated models for the evaluation of colorectal polyps in colon cancer screening studies—a value-based biostatistics practice [PDF]

PeerJ
Background Colon cancer screening studies are needed for the early detection of colorectal polyps to reduce the risk of colorectal cancer. Unfortunately, the data generated on colon polyps are typically analyzed in their dichotomized form and sometimes ...
Alok K. Dwivedi, Sherif E. Elhanafi, Mohamed O. Othman, Marc J. Zuckerman   +3 more
doaj   +2 more sources

Zero-inflated count distributions for capture-mark-reencounter data

Ecology and Evolution, 2022
The estimation of demographic parameters is a key component of evolutionary demography and conservation biology. Capture-mark-recapture methods have served as a fundamental tool for estimating demographic parameters. The accurate estimation of demographic parameters in capture-mark-recapture studies depends on accurate modeling of the observation ...
Thomas V. Riecke, Daniel Gibson, James S. Sedinger, Michael Schaub   +3 more
openaire   +2 more sources