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A discrete version of the half-normal distribution and its generalization with applications

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Abstract

A new discrete distribution depending on two parameters \(\alpha >-1\) and \(\sigma >0\) is obtained by discretizing the generalized normal distribution proposed in García et al. (Comput Stat and Data Anal 54:2021–2034, 2010), which was derived from the normal distribution by using the Marshall and Olkin (Biometrika 84(3):641–652, 1997) scheme. The particular case \(\alpha =1\) leads us to the discrete half-normal distribution which is different from the discrete half-normal distribution proposed previously in the statistical literature. This distribution is unimodal, overdispersed (the responses show a mean sample greater than the variance) and with an increasing failure rate. We revise its properties and the question of parameter estimation. Expected frequencies were calculated for two overdispersed and underdispersed (the responses show a variance greater than the mean) examples, and the distribution was found to provide a very satisfactory fit.

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Acknowledgments

The authors would like to thank the referees who helped to improve the paper. The research was partially funded by Grants SEJ–02814, P09–SEJ–4739 (Consejería de Economía, Innovación y Ciencia, Junta de Andalucía, Spain) and ECO2009–14152 (MICINN, Spain).

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Authors and Affiliations

  1. Department of Quantitative Methods, University of Las Palmas de Gran Canaria, 35017, Las Palmas de Gran Canaria, Spain

    E. Gómez-Déniz & F. J. Vázquez-Polo

  2. Department of Statistics and Operational Research, University of Cadiz, Cadiz, Spain

    V. García-García

Authors
  1. E. Gómez-Déniz
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  2. F. J. Vázquez-Polo
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  3. V. García-García
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Correspondence to E. Gómez-Déniz.

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Gómez-Déniz, E., Vázquez-Polo, F.J. & García-García, V. A discrete version of the half-normal distribution and its generalization with applications. Stat Papers 55, 497–511 (2014). https://doi.org/10.1007/s00362-012-0494-6

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  • DOI: https://doi.org/10.1007/s00362-012-0494-6

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