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UNA EXTENSIÓN DE LA DISTRIBUCIÓN WEIBULL DE DOS PARÁMETROS
AN EXTENSION OF THE TWO-PARAMETER WEIBULL DISTRIBUTION
Keywords:
coeficiente de asimetría, distribución Weibull, kurtosis, Slash (es)Asymmetry, Kurtosis, Slash distribution, Weibull distribution (en)
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1Universidad de Atacama, Facultad de Ingeniería, Departamento de Matemática, Copiapó, Chile. Instructor. Email: jolivares@mat.uda.cl
2Universidad de Atacama, Facultad de Ingeniería, Departamento de Ingeniería Informática y Ciencias de la Computación, Copiapó, Chile. Profesor asistente. Email: hcornide@diicc.uda.cl
3Universidad de Atacama, Facultad de Ingeniería, Departamento de Ingeniería Informática y Ciencias de la Computación, Copiapó, Chile. Profesor asistente. Email:mmonasterio@diicc.uda.cl
En este artículo se presenta una extensión de la distribución Weibull de dos parámetros, con el objetivo de flexibilizar el modelo en términos de la kurtosis. Se estudian las propiedades básicas de la nueva densidad obtenida, así como su función de distribución, momentos, coeficientes de asimetría y kurtosis. Se realizan estudios de simulación para algunos casos particulares, ilustrando la utilidad de la extensión considerada.
Palabras clave: coeficiente de asimetría, distribución Weibull, kurtosis, Slash.
In this paper, we present an extension of the Two-parameter Weibull distribution to make it even more flexible in terms of its kurtosis coefficient. Properties involving moments and asymmetry and kurtosis indexes are studied. Simulation studies for some cases, illustrating the usefulness of the extension considered, are carried out.
Key words: Asymmetry, Kurtosis, Slash distribution, Weibull distribution.
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Referencias
1. Byrd, R. H., Lu, P., Nocedal, J. & Zhu, C. (1995), 'A Limited Memory Algorithm for Bound Constrained Optimization', SIAM Journal on Scientific Computing 16(5), 1190-1208.
2. Chen, Z. (2000), 'An New Two-parameter Lifetime Distribution with Bathtub-Shape or Increasing Failure Rate Function', Statistics and Probability Letters 49(2), 155-161.
3. Gómez, H. W., Olivares-Pacheco, J. F. & Bolfarine, H. (2009), 'An Extension of the Generalized Birnbaum-Saunders Distributions', Statistics and Probability Letters 79(3), 331-338.
4. Gómez, H. W., Quintana, F. A. & Torres, F. J. (2007), 'A New Family Slash-Distributions with Elliptical Contours',Statistics and Probability Letters 77(7), 717-725.
5. Johnson, N. L., Kotz, S. & Balakrishnan, N. (1995), Continuous Univariate Distributions, Second edn, Wiley, New York.
6. Kafadar, K. (1982), 'A Biweight Approach to the One-Sample Problem', Journal of the American Statistical Association 77(378), 416-424.
7. Mosteller, F. & Tukey, J. W. (1977), Data Analysis and Regression, Addison-Wesley.
8. Rogers, W. H. & Tukey, J. W. (1972), 'Understanding Some Long-tailed Symmetrical Distribution', Statistics Neerlandia 26, 211-226.
9. Tang, Y., Xie, M. & Goh, N. T. (2003), 'Statistical Analysis of a Weibull Extension Model', Communications in Statistics: Theory and Methods 32(5), 913-928.
10. Wang, J. & Genton, M. G. (2006), 'The Multivariate Skew-Slash Distribution', Journal of Statistical Planning and Inference 136(1), 209-220.
11. Zhang, T. & Xie, M. (2007), 'Failure Data Analysis with Extended Weibull Distribution', Communications in Statistics: Simulation and Computation 36(3), 579-592.
Este artículo se puede citar en LaTeX utilizando la siguiente referencia bibliográfica de BibTeX:
@ARTICLE{RCEv33n2a03,AUTHOR = {Olivares-Pacheco, Juan F. and Cornide-Reyes, Héctor C. and Monasterio, Manuel},
TITLE = {{Una extensión de la distribución Weibull de dos parámetros}},
JOURNAL = {Revista Colombiana de Estadística},
YEAR = {2010},
volume = {33},
number = {2},
pages = {219-231}
}
References
Byrd, R. H., Lu, P., Nocedal, J. & Zhu, C. (1995), 'A Limited Memory Algorithm for Bound Constrained Optimization', SIAM Journal on Scientific Computing 16(5), 1190-1208.
Chen, Z. (2000), 'An New Two-parameter Lifetime Distribution with Bathtub-Shape or Increasing Failure Rate hinction', Statistics and Probability Letters 49(2), 155-161.
Gómez, H. W., Olivares-Pacheco, J. F. & Bolfarine, H. (2009), 'An Extension of the Generalized Birnbaum-Saunders Distributions', Statistics and Probability Letters 79(3), 331-338.
Gómez, H. W., Quintana, F. A. & Torres, F. J. (2007), 'A New Family Slash-Distributions with Elliptical Contours', Statistics and Probability Letters 77(7), 717-725.
Johnson, N. L., Kotz, S. & Balakrishnan, N. (1995), Continuous Univariate Dis-tributions, second edn, Wiley, New York.
Kafadar, K. (1982), 'A Biweight Approach to the One-Sample Problem', Journal of the American Statistical Association 77(378), 416-424.
Mosteller, F. & Tukey, J. W. (1977), Data Analysis and Regression, Addison-Wesley.
Rogers, W. H. & Tukey, J. W. (1972), 'Understanding Some Long-tailed Symme-trical Distribution', Statistics Neerlandia 26, 211-226.
Tang, Y., Xie, M. & Goh, N. T. (2003), 'Statistical Analysis of a Weibull Extension Model', Communications in Statistics: Theory and Methods 32(5), 913-928.
Wang, J. & Genton, M. G. (2006), The Multivariate Skew-Slash Distribution', Journal of Statistical Planning and Inference 136(1), 209-220.
Weibull, W. (1951), 'A Statistical Distribution Function of Wide Applicability', Journal of Applied Mechanics 18, 293-297.
Zhang, T. & Xie, M. (2007), 'Failure Data Analysis with Extended Weibull Distribution', Communications in Statistics: Simulation and Computation 36(3), 579-592.
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