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The Egyptian Statistical Journal
ISSN 2786-0086 · Cairo University, Faculty of Graduate Studies for Statistical Research (FGSSR) · 910 artikel di indeks
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Disability Prevalence among Older Adults in Egypt: A Systematic Review and Meta-Analysis
Disability in older adults is an emerging public health concern, particularly in countries undergoing demographic transition such as Egypt. This study aimed to estimate the prevalence of disability among older adults in Egypt and examine associated demographic and health factors. A systematic…
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An Extension of Three-Parameter Gamma Weibull Distribution: Properties, Estimation and Applications
This paper introduces a new four-parameter weighted distribution called the weighted gamma Weibull distribution. This new distribution is introduced by applying the weighted version to the baseline three-parameter gamma Weibull distribution. The probability density, cumulative distribution…
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Modelling Inflation Rate Using a Dynamic Autoregressive Time Series Regression Model
The limitations of the conventional time series approach that captures periodic and seasonal datasets but fails to account for external macroeconomic influences brought about the development of a model called a Dynamic Autoregressive Time Series Regression (DATSR) Model, which integrates…
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Performance Evaluation of Measures of Central Tendency (MCT) in Tackling Missing Data in Collinear Regressors: A Comparison of Linear Estimators
The presence of missing data and multicollinearity in regression analysis poses significant challenges to the reliability and accuracy of model estimates. Missing data can lead to biased parameter estimates, while multicollinearity inflates standard errors, making it difficult to determine the true…
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Determinants of Delayed Initiation of Breastfeeding in Egypt
The early initiation of breastfeeding, ideally within the first hour after birth, is critical for newborn health, yet only 27% of infants in Egypt meet this standard, according to the 2014 Egypt Demographic and Health Survey. This study investigates the factors contributing to delayed initiation of…
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Statistical Analysis of Time Spent by HIV/AIDS Patients from Infection to Death in North-Eastern Nigeria.
Nigeria ranks second globally in HIV burden, with about 3.2 million people living with the disease, following South Africa, which has approximately 6.8 million cases. Although Nigeria is populous and HIV infections remain a critical issue requiring systematic and highly tailored interventions…
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The Uniform Hazard Power Parameter Distribution: Development, Analysis, Properties, Inference, and Applications
Uniform distributions are pivotal in statistical modeling, particularly in Monte Carlo simulations, hypothesis testing, and survival analysis. This paper introduces a novel version, called the Uniform Hazard Power Parameter (UHPP) distribution, which serves as a semi-parametric extension of the…
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Modeling of Aggregate Losses of Metastatic Cancer Using Katz Family (a, b, 0) Distributions
The incidence of metastatic cancer over the years has gradually increased. This can be due to delayed quality treatment, attributed to insufficient funds. Models that can more accurately price cancer insurance policies incorporating its metastatic nature would enable insurance firms to develop…
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A Proposed Ordinal Logistic Regression Model for the Mental Health Status Changes in Egypt According to the COVID-19 Pandemic
The global health emergency of COVID-19, stemming from the novel coronavirus SARS-CoV-2, emerged toward the end of 2019 and spread rapidly worldwide, profoundly affecting societies. The rapid transmission of the virus transcended geographical borders, social structures, and economic systems…
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Credit Scoring in Digital Lending: A Stepwise Logistic Regression and Weight of Evidence Approach in Kenya
Mobile money lending has grown rapidly in recent years, with one of the major challenges being the determination of borrowers' creditworthiness, a classification problem complicated by credit risk and the choice of appropriate scoring models. Credit scoring, which uses statistical analysis of…
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Hybridizing GARCH and Random Forest for Enhanced Modeling of Volatility Clustering
Clustered volatility refers to a non-stationary process in which the mean and variance of a time series change over time rather than remaining constant, reflecting the dynamic nature of volatility, which fluctuates in response to varying market or structural conditions and often results in…
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Geospatial Modelling of Overdispersed Zero-inflated Count Data: An Application to COVID-19 Mortalities across the United States
In the early stages of any pandemic, the number of cases/deaths related to the contagious infectious disease in a certain area is often skewed, over-dispersed, and has excessive zeros, as some areas may have no contagions for some time. For these reasons, this paper adopted a geographically…
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Parameter Estimation and Data Analysis Using a Novel Extension of Weibull Distribution
Recently, statistical modeling has become essential for analyzing real-world datasets across various fields. However, classical statistical distributions often lack the flexibility to capture the complexity of observed phenomena accurately. For example, in reliability engineering and biomedical…
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Prevalence and Associated Factors of Different Forms of Domestic Violence Against Women in Egypt: A Multivariable Binary Logistic Regression
Recognizing domestic violence against women as a significant public health and human rights issue, this study was conducted to broaden understanding of spousal violence in Egypt. Using data from the 2021 Egypt Family Health Survey, a nationally representative survey, this study aims to determine…
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A Stochastic Model for Claim Count Data
In actuarial science, weighted and mixed Poisson distributions are widely employed for claim count modeling due to their flexibility in handling over-dispersed data. This study introduces a novel claim count distribution—the Erlang-Poisson (EP) mixture and examines its distinctive properties: (i) a…
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Enhancing Forecasting Accuracy of Financial Time Series by Hybrid VAR and Transfer Function Models
Our study suggests an approach that integrates vector autoregressive and transfer function models to enhance the modeling and forecasting of financial time series. All variables are endogenous, which may limit their ability to capture the influence of external factors in Vector Autoregressive…
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Comparative Analysis of Picard and Bayesian Methods for Generalized Weibull: Parameter Estimation with Real Data Applications
Bayesian methods are widely employed for parameter estimation but often depend on subjective prior specifications, which can impact their robustness. This study evaluates Picard’s approach as a numerical estimation methodology for the generalized Weibull model, comparing its performance against the…
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Hospitals in Crisis: Review of Country Policy Solutions Through the Lens of System Resilience Analysis
The significant rise in natural disasters and the escalation of global conflicts and wars have heightened human vulnerability to crises and intensified their effects. Moreover, the COVID-19 pandemic further emphasized the importance of adopting a resilience-focused policy to prepare health systems…
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QIC’s Type I Error Rate for Longitudinal Data Models with a Binary Response and Minimization Strategies
Proper specification of the marginal mean structure is necessary for effective Generalized Estimating Equations (GEE) estimation for longitudinal data and hence requires careful selection of the constituent covariates. The Quasi-Likelihood Information Criterion (QIC) is widely used to select such…
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Factors Associated with Violent Disciplinary Practices Against Children: Using General Structural Equation Modeling
Violent disciplinary practices, including the use of physical punishment and psychological aggression by parents and caregivers, are widespread in Egypt. Therefore, understanding the economic and social factors associated with these practices is essential to reduce their use against children, given…