Research Article

New families of the Gumbel distribution: Bimodality, regression, and applications

Volume: 54 Number: 6 December 30, 2025
EN

New families of the Gumbel distribution: Bimodality, regression, and applications

Abstract

This paper proposes a new generalization of the univariate Gumbel distribution between theory and application. With only one scale parameter and one location parameter, the Gumbel distribution is known to model many real-world applications related to extreme weather conditions, engineering, and more. Because of its importance, statisticians are constantly looking to increase its flexibility and applicability by using it as a base distribution in many generalization methods. The first part of this paper presents a list of some of the most well-known recent Gumbel generalizations, based on different generalization techniques. In the second part, we employ theoretical principles to introduce a new generalization of the Gumbel distribution using the $T$-$R\{Y\}$ framework. In the application section, two real-life data sets are used to compare the goodness of fit of our new generalization to that of competitive distributions in modeling unimodal and bimodal data. Lastly, a regression model with censored data is presented for one of the members of the new generalization.

Keywords

Supporting Institution

The first author gratefully acknowledges the support received from the Department of Mathematics at the State University of New York at Farmingdale (SUNY-FSC) during the summer.

References

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  4. [4] A. Aljarrah, C. Lee and F. Famoye, On generating T-X family of distributions using the quantile function, J. Stat. Distrib. Appl. 1 (2), 117, 2014.
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  6. [6] A. Alzaghal and M. Aldeni, A Versatile Family of Generalized Log-logistic Distributions: Bimodality, Regression, and Applications, Hacet. J. Math. Stat. 51 (3), 857881, 2022.
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Details

Primary Language

English

Subjects

Statistical Theory, Probability Theory, Statistics (Other)

Journal Section

Research Article

Publication Date

December 30, 2025

Submission Date

May 29, 2025

Acceptance Date

November 27, 2025

Published in Issue

Year 2025 Volume: 54 Number: 6

APA
Alzaghal, A., Aldenı, M., & Hamed, D. (2025). New families of the Gumbel distribution: Bimodality, regression, and applications. Hacettepe Journal of Mathematics and Statistics, 54(6), 2543-2566. https://doi.org/10.15672/hujms.1707784
AMA
1.Alzaghal A, Aldenı M, Hamed D. New families of the Gumbel distribution: Bimodality, regression, and applications. Hacettepe Journal of Mathematics and Statistics. 2025;54(6):2543-2566. doi:10.15672/hujms.1707784
Chicago
Alzaghal, Ahmad, Mahmoud Aldenı, and Duha Hamed. 2025. “New Families of the Gumbel Distribution: Bimodality, Regression, and Applications”. Hacettepe Journal of Mathematics and Statistics 54 (6): 2543-66. https://doi.org/10.15672/hujms.1707784.
EndNote
Alzaghal A, Aldenı M, Hamed D (December 1, 2025) New families of the Gumbel distribution: Bimodality, regression, and applications. Hacettepe Journal of Mathematics and Statistics 54 6 2543–2566.
IEEE
[1]A. Alzaghal, M. Aldenı, and D. Hamed, “New families of the Gumbel distribution: Bimodality, regression, and applications”, Hacettepe Journal of Mathematics and Statistics, vol. 54, no. 6, pp. 2543–2566, Dec. 2025, doi: 10.15672/hujms.1707784.
ISNAD
Alzaghal, Ahmad - Aldenı, Mahmoud - Hamed, Duha. “New Families of the Gumbel Distribution: Bimodality, Regression, and Applications”. Hacettepe Journal of Mathematics and Statistics 54/6 (December 1, 2025): 2543-2566. https://doi.org/10.15672/hujms.1707784.
JAMA
1.Alzaghal A, Aldenı M, Hamed D. New families of the Gumbel distribution: Bimodality, regression, and applications. Hacettepe Journal of Mathematics and Statistics. 2025;54:2543–2566.
MLA
Alzaghal, Ahmad, et al. “New Families of the Gumbel Distribution: Bimodality, Regression, and Applications”. Hacettepe Journal of Mathematics and Statistics, vol. 54, no. 6, Dec. 2025, pp. 2543-66, doi:10.15672/hujms.1707784.
Vancouver
1.Ahmad Alzaghal, Mahmoud Aldenı, Duha Hamed. New families of the Gumbel distribution: Bimodality, regression, and applications. Hacettepe Journal of Mathematics and Statistics. 2025 Dec. 1;54(6):2543-66. doi:10.15672/hujms.1707784