Skew-symmetric distributions generated by the distribution function of the normal distribution
Skew-symmetric distributions generated by the distribution function of the normal distribution
Authors
Gómez, H.W.
Venegas Torres, Osvaldo
Bolfarine, H.
Venegas Torres, Osvaldo
Bolfarine, H.
Authors
Date
2012-02-25
Datos de publicación:
10.1002/env.817
Keywords
Matemáticas
Collections
Abstract
In this paper we study a general family of skew-symmetric distributions which are generated by the cumulative distribution of the normal distribution. For some distributions, moments are computed which allows computing asymmetry and kurtosis coefficients. It is shown that the range for asymmetry and kurtosis parameters is wider than for the family of models introduced by Nadarajah and Kotz (2003). For the skew-t-normal model, we discuss approaches for obtaining maximum likelihood estimators and derive the Fisher information matrix, discussing some of its properties and special cases. We report results of an application to a real data set related to nickel concentration in soil samples.