Mathematics and Statistics Vol. 12(5), pp. 401 - 408
DOI: 10.13189/ms.2024.120501
Reprint (PDF) (285Kb)

On a Variant Weibull-Weibull Distribution: Theory and Properties

S. O. Ezeah ^*, A. A. Adekola , O. O. Fabelurin , T. O. Obilade
Department of Mathematics, Obafemi Awolowo University, Nigeria

ABSTRACT

In general, distribution theory plays a crucial role in modeling various real-life phenomena, making it a fundamental tool in statistical analysis and decision-making. Over the years, extensive research has been conducted on different statistical distributions and estimation techniques. While the literature abounds with information regarding well-known distributions, there is always room for exploring new variants that can better capture the characteristics of complex phenomena. In this paper, we contribute to the field of distribution theory by introducing novel probability distribution called the Weibull-Weibull distribution. The Weibull-Weibull distribution is derived by compounding two Weibull distributions, and it offers a flexible framework for modeling phenomena that exhibits a complex interplay of factors. By combining the strength of the Weibull distribution with itself, we are able to capture a wider range of shapes and behaviour, providing more accurate representations of real-world occurrences. To facilitate the practical application of the Weibull-Weibull distribution, we employ the maximum likelihood estimation (MLE) approach to estimate its shape and scale parameters. The MLE method is a widely used statistical technique that allows us to determine the most likely values of the parameters based on observed data. By applying this estimation method to the Weibull-Weibull distribution, we enable researchers and practitioners to effectively utilize this new distribution in their analyses and modeling efforts. Furthermore, we delved into a comprehensive study of statistical theory and properties of the Weibull-Weibull distribution. We investigate its moments, cumulative distribution function, probability density function, and other key measures. Through rigorous analysis, we establish the theoretical foundations of the Weibull-Weibull distribution and provide insights into its behaviour and characteristics. This comprehensive examination equips researchers with a solid understanding of the distribution, enabling them make informed decisions and interpretations when working with real-life data. In conclusion, our research introduces the Weibull-Weibull distribution as a valuable addition to the existing repertoire of statistical distributions. By leveraging the power of compounding two Weibull distributions, we provide a flexible and robust framework of modeling complex phenomena. With the use of maximum likelihood estimation and the given Chernoff bound, practitioners are able to estimate the distribution's parameters as well as analyze its tails accurately. Our extensive statistical analysis further enhances the understanding of the Weibull-Weibull distribution, facilitating its practical application in a wide range of fields, including reliability analysis, survival analysis, and risk assessment.

KEYWORDS
Weibull Distribution, Survival Function, Hazard Function, Maximum Likelihood estimate, Moments, Weibull-Weibull Distribution, Chernoff Bound

Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] S. O. Ezeah , A. A. Adekola , O. O. Fabelurin , T. O. Obilade , "On a Variant Weibull-Weibull Distribution: Theory and Properties," Mathematics and Statistics, Vol. 12, No. 5, pp. 401 - 408, 2024. DOI: 10.13189/ms.2024.120501.

(b). APA Format:
S. O. Ezeah , A. A. Adekola , O. O. Fabelurin , T. O. Obilade (2024). On a Variant Weibull-Weibull Distribution: Theory and Properties. Mathematics and Statistics, 12(5), 401 - 408. DOI: 10.13189/ms.2024.120501.