ISSN: 1304-7191 | E-ISSN: 1304-7205
Wrapped size biased gamma Lindley distribution with application
1Department of Mathematics, Shri Vishnu Engineering College for Women (A), Vishnupur, Bhimavaram, 534202, India
2Department of Actuarial Sciences, Faculty of Humanities and Social Sciences, Kırıkkale University, 71451, Türkiye
Sigma J Eng Nat Sci 1124-1131 DOI: 10.14744/sigma.2025.00109
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Abstract

This article introduces a new circular distribution, the wrapped size-biased gamma Lindley distribution. The article elucidates the properties of this newly proposed distribution, providing explicit expressions for key statistical measures such as the characteristic function, trigonometric moments, resultant length, mean, circular variance, standard deviation, skewness, and kurtosis. Estimation of model parameters is conducted using the maximum likelihood and weighted least squares methods. Lastly, the article applies the model to real-world data and compares its goodness of fit against the established model in the existing literature.