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SORT	8 records found	Search took 0.01 seconds.

16 p, 179.8 KB

Inference on the parameters of the Weibull distribution using records / Jafari, Ali Akbar (Yazd University (Yazd, Iran). Department of Statistics) ; Zakerzadeh, Hojatollah (Yazd University (Yazd, Iran). Department of Statistics)
The Weibull distribution is a very applicable model for lifetime data. In this paper, we have investigated inference on the parameters of Weibull distribution based on record values. We first propose a simple and exact test and a confidence interval for the shape parameter. [...]
2015
SORT : statistics and operations research transactions, Vol. 39 Núm. 1 (January-June 2015) , p. 3-18 (Articles)

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16 p, 942.4 KB

Small area estimation of poverty indicators under partitioned area-level time models / Morales, Domingo (Universidad Miguel Hernández de Elche) ; Pagliarella, Maria Chiara (Universita degli Studi di Siena. Dipartimento di Economia Politica e Statistica) ; Salvatore, Renato (Universita degli Studi di Siena. Dipartimento di Economia Politica e Statistica)
This paper deals with small area estimation of poverty indicators. Small area estimators of these quantities are derived from partitioned time-dependent area-level linear mixed models. The introduced models are useful for modelling the different behaviour of the target variable by sex or any other dichotomic characteristic. [...]
2015
SORT : statistics and operations research transactions, Vol. 39 Núm. 1 (January-June 2015) , p. 19-34 (Articles)

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16 p, 308.4 KB

A new class of Skew-Normal-Cauchy Distribution / Arrué, Jaime (Universidad de Antofagasta (Antofagasta, Xile). Departamento de Matemáticas) ; Gómez, Héctor W. (Universidad de Antofagasta (Antofagasta, Xile). Departamento de Matemáticas) ; Salinas, Hugo S. (Universidad de Atacama (Copiapo, Xile). Departamento de Matemáticas) ; Bolfarine, Heleno (Universidade de São Paulo. Departamento de Estadística)
In this paper we study a new class of skew-Cauchy distributions inspired on the family extended two-piece skew normal distribution. The new family of distributions encompasses three well known families of distributions, the normal, the two-piece skew-normal and the skew-normal-Cauchy distributions. [...]
2015
SORT : statistics and operations research transactions, Vol. 39 Núm. 1 (January-June 2015) , p. 35-50 (Articles)

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20 p, 317.5 KB

Diagnostic plot for the identification of high leverage collinearity-influential observations / Bagheri, Arezoo (National Population Studies & Comprehensive Management Institute (Teheran, Iran)) ; Midi, Habshah (Universiti Putra Malaysia. Department of Mathematics)
High leverage collinearity influential observations are those high leverage points that change the multicollinearity pattern of a data. It is imperative to identify these points as they are responsible for misleading inferences on the fitting of a regression model. [...]
2015
SORT : statistics and operations research transactions, Vol. 39 Núm. 1 (January-June 2015) , p. 51-70 (Articles)

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14 p, 212.2 KB

Discrete alpha-skew-Laplace Distribution / Harandi, S. Shams (University of Isfahan. Department of Statistics) ; Alamatsaz, M. H. (University of Isfahan. Department of Statistics)
Classical discrete distributions rarely support modelling data on the set of whole integers. In this paper, we shall introduce a flexible discrete distribution on this set, which can, in addition, cover bimodal as well as unimodal data sets. [...]
2015
SORT : statistics and operations research transactions, Vol. 39 Núm. 1 (January-June 2015) , p. 71-84 (Articles)

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24 p, 266.8 KB

A mathematical programming approach for different scenarios of bilateral bartering / Nasini, Stefano (Universitat Politècnica de Catalunya) ; Castro, Jordi (Universitat Politècnica de Catalunya) ; Fonseca, Pau (Universitat Politècnica de Catalunya)
The analysis of markets with indivisible goods and fixed exogenous prices has played an important role in economic models, especially in relation to wage rigidity and unemployment. This paper provides a novel mathematical programming based approach to study pure exchange economies where discrete amounts of commodities are exchanged at fixed prices. [...]
2015
SORT : statistics and operations research transactions, Vol. 39 Núm. 1 (January-June 2015) , p. 85-108 (Articles)

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18 p, 242.3 KB

A comparison of computational approaches for maximum likelihood estimation of the Dirichlet parameters on high-dimensional data / Giordan, Marco (Istituto Agrario San Michele all'Adige (IASMA) Research and Innovation Centre) ; Wehrens, Ron (Istituto Agrario San Michele all'Adige (IASMA) Research and Innovation Centre)
Likelihood estimates of the Dirichlet distribution parameters can be obtained only through numerical algorithms. Such algorithms can provide estimates outside the correct range for the parameters and/or can require a large amount of iterations to reach convergence. [...]
2015
SORT : statistics and operations research transactions, Vol. 39 Núm. 1 (January-June 2015) , p. 109-126 (Articles)

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20 p, 189.7 KB

The exponentiated discrete Weibull distribution / Nekoukhou, Vahid (University of Isfahan. Department of Statistics) ; Bidram, Hamid (University of Isfahan. Department of Statistics)
In this paper, the exponentiated discrete Weibull distribution is introduced. This new generalization of the discrete Weibull distribution can also be considered as a discrete analogue of the exponentiated Weibull distribution. [...]
2015
SORT : statistics and operations research transactions, Vol. 39 Núm. 1 (January-June 2015) , p. 127-146 (Articles)

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