ON THE PROPERTIES AND APPLICATIONS OF A NEW EXTENSION OF EXPONENTIATED RAYLEIGH DISTRIBUTION

  • Hussein Abdulsalam Ahmadu Bello University, Zaria-Nigeria
  • Yahaya Abubakar Ahmadu Bello University, Zaria
  • Hussaini Garba Dikko
Keywords: Gompertz-Exponentiated Rayleigh; Probability Distribution; Order statistics; Entropy measures; Maximum Product of Spacing

Abstract

Statistical distributions already in existence are not the most appropriate model that adequately describes real-life data such as those obtained from experimental investigations. Therefore, there are needs to come up with their extended forms to give substitutive adaptable models. By adopting the method of Transformed-Transformer family of distributions, an extension of Exponentiated Rayleigh distribution titled Gompertz- Exponentiated Rayleigh (GOM-ER) distribution was proposed and proved to be valid. Some properties of the new distribution including random number generator, quartiles, distribution of smallest and largest order statistics, reliability function, hazard rate function, cumulative or integrated hazard function, odds function, non-central moments, moment generating function, mean, variance and entropy measures were derived.  Using the methods of maximum likelihood and maximum product of spacing, the four unknown parameters were estimated.  Shapes of the hazard function depicts that GOM-ER is a distribution that is strictly increasing while those of the PDF depicts that GOM-ER can be skewed or symmetrical. Two datasets were fitted to determine the flexibility of GOM-ER. Simulation study evaluates the consistency, accuracy and unbiasedness of the GOM-ER parameter estimates obtained from the two frequentist estimation methods adopted.

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Published
2021-07-07
How to Cite
Abdulsalam, H., Abubakar, Y., & Dikko, H. G. (2021). ON THE PROPERTIES AND APPLICATIONS OF A NEW EXTENSION OF EXPONENTIATED RAYLEIGH DISTRIBUTION. FUDMA JOURNAL OF SCIENCES, 5(2), 377 - 398. https://doi.org/10.33003/fjs-2021-0502-459