Kumaraswamy Regression Modeling for Bounded Outcome Scores Publisher



Hamedishahraki S¹ ; Rasekhi A² ; Eshraghian MR³ ; Yekaninejad MS³ ; Pakpour AH⁴
Source: Pakistan Journal of Statistics and Operation Research Published:2021

Abstract

In this paper, we use a regression model for modeling bounded outcome scores (BOS), where the outcome is Kumaraswamy distributed. Similar to the Beta distribution, this distribution can take a variety of shapes while being computationally easier to use. Thus, it is deemed as a suitable alternative distribution to the Beta in modeling bounded random processes. In the proposed model, the median of a bounded response is modeled by the linear predictors which are defined through regression parameters and explanatory variables. We obtained the maximum likelihood estimates (MLEs) of the parameters, provided closed-form expressions for the score functions and Fisher information matrix, and presented some diagnostic measures. We conducted Monte Carlo simulations to investigate the finite-sample performance of the MLEs of the parameters. Finally, two practical applications of this model to the real data sets are presented and discussed. © 2021. All Rights Reserved.