Resultados globales: 6 registros encontrados en 0.03 segundos.
Artículos, Encontrados 6 registros
Artículos Encontrados 6 registros  
1.
24 p, 284.7 KB Two alternative estimation procedures for the negative binomial cure rate model with a latent activation scheme / Gallardo, Diego I. (Universidad de Antofagasta (Chile). Departamento de Matemáticas) ; Bolfarine, Heleno (Universidade de São Paulo. Departamento de Estatística)
In this paper two alternative estimation procedures based on the EM algorithm are proposed forthe flexible negative binomial cure rate model with a latent activation scheme. The Weibull modelas well as the log-normal and gamma distributions are also considered for the time-to-event datafor the non-destroyed cells. [...]
2016
SORT : statistics and operations research transactions, Vol. 40 Núm. 1 (January-June 2016) , p. 31-54 (Articles)  
2.
22 p, 237.6 KB Likelihood-based inference for the power regression model / Martínez-Flórez, Guillermo (Universidad de Córdoba. Departamento de Matemáticas y Estadística) ; Bolfarine, Heleno (Universidade de São Paulo. Departamento de Estadística) ; Gómez, Héctor W. (Universidad de Antofagasta (Antofagasta, Xile). Departamento de Matemáticas)
In this paper we investigate an extension of the power-normal model, called the alpha-power model and specialize it to linear and nonlinear regression models, with and without correlated errors. Maximum likelihood estimation is considered with explicit derivation of the observed and expected Fisher information matrices. [...]
2015
SORT : statistics and operations research transactions, Vol. 39 Núm. 2 (July-December 2015) , p. 187-208 (Articles)  
3.
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)  
4.
16 p, 162.7 KB An extension of the slash-elliptical distribution / Rojas, Mario A. (Universidad de Antofagasta (Antofagasta, Xile). Departamento de Matematicas) ; Bolfarine, Heleno (Universidad de Sao Paulo. Departamento de Estatística) ; Gómez, Héctor W. (Universidad de Antofagasta (Antofagasta, Xile). Departamento de Matematicas)
This paper introduces an extension of the slash-elliptical distribution. This new distribution is generated as the quotient between two independent random variables, one from the elliptical family (numerator) and the other (denominator) a beta distribution. [...]
2014
SORT : statistics and operations research transactions, Vol. 38 Núm. 2 (July-December 2014) , p. 215-230  
5.
10 p, 87.7 KB A note on the likelihood and moments of the skew-normal distribution / Martínez, E. H. (Universidad de Antofagasta) ; Varela, H. (Universidad de Antofagasta) ; Gómez, Héctor W. (Universidad de Atacama (Chile)) ; Bolfarine, Heleno (Universidad de Sao Paulo)
In this paper an alternative approach to the one in Henze (1986) is proposed for deriving the odd moments of the skew-normal distribution considered in Azzalini (1985). The approach is based on a Pascal type triangle, which seems to greatly simplify moments computation. [...]
2008
SORT : statistics and operations research transactions, Vol. 32, Núm. 1 (January-June 2008) , p. 57-66  
6.
22 p, 334.6 KB Influence diagnostics in exponentiated-Weibull regression models with censored data / Ortega, Edwin M. M. ; Cancho, Vicente G. ; Bolfarine, Heleno
Diagnostic methods have been an important tool in regression analysis to detect anomalies, such as departures from the error assumptions and the presence of outliers and influential observations with the fitted models. [...]
2006
SORT : statistics and operations research transactions, Vol. 30, Núm. 2 (July-December 2006) , p. 171-192  

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