Digital Commons Network^™

Quality-Quantity Tradeoff Of Children In Egypt, Ehab Sakr, Mona Khalifa, Farouk Shoieb, Sayed Khater

Journal of Statistics Applications & Probability

In Egypt, children are still seen as a source of income. We would, therefore, expect that quantity–quality tradeoff decisions are central in shaping fertility and education choices so that a negative causal effect of family size on child’s schooling exists. In this paper we argue that families display degrees of trading off quantity for quality and that this range of reactions is affected by socioeconomic, cultural and demographic covariates. The dataset used is that of the Egypt Labor Market Panel Survey (ELMPS) 2012. The sample includes 6,808 individuals in the age group (18-30). By applying cluster analysis, the sample was …

Statistical Analysis Of Factors Associated With Early Marriage Among Women In Ethiopia: Application Of Multilevel Logistic Regression Model, Lata Fekadu Tolera, Aboma Temesgen Sebu

Journal of Statistics Applications & Probability

Early marriage is still widely practiced in many parts of the world mainly in developing countries and dominant in Sub- Saharan countries. Ethiopia is also among theses Sub-Saharan countries which practices early marriage with the highest prevalence rate. The main purpose of this study was also to analyze associated factors of early marriage of women in Ethiopia with the consideration of regional variability of the practices using multilevel model. The study utilized secondary data collected on 9825 married women nested within 9 regions and two city adminstration of Ethiopia obtained from 2016 Ethiopia demographic and health survey(EDHS). Multilevel logistic regression …

Robust Bayesian Analysis For Shape Parameters With Progressive Type-Ii Censoring, N. Wheed, M. M. Nassar, M. Mahmoud, M. Yusuf

Journal of Statistics Applications & Probability

In this paper, we discuss the robustness of bayesian estimation for the exponentiated inverted Weibull distribution and the inverted Kumaraswamy distribution under progressive type-II censored samples. To estimate the unknown shape parameters of the two distributions, we use Lindley approximation to obtain Bayes estimates using the loss functions; square error loss function, linex loss function and general entorpy loss function under the non-informative and informative priors for the parameters. A simulation study is conducted to compare different estimates and the actual values of the shape parameters. Our aim is to study the robustness of estimation with regard to the three …

New Generalization Families Of Higher Order Changhee Numbers And Polynomials, Abdelfattah Mustafa, Abdelfattah Mustafa, F. M. Abdel Moneim, B. S. El-Desouky

Journal of Statistics Applications & Probability

In this paper, we present a new definition for the generalization of first and second kinds of higher-order Changhee numbers and polynomials. Furthermore, some new results are derived for these generalizations. Moreover, some interesting special cases are deduced of these Changhee numbers and polynomials.

A New Two-Parameter Estimator In The Linear Regression Model With Correlated Regressors, Abiola T. Owolabi, Kayode Ayinde, Janet I. Idowu, Olasunkanmi J. Oladapo, Dewale F. Lukman

Journal of Statistics Applications & Probability

The inefficiency of the ordinary least square estimator for the parameter estimation of a linear regression model with multicollinearity problem has led to the development of various ridge regression estimators. These estimators are recently classified as one-parameter and two-parameter ridge-type estimators. This paper proposes a new two-parameter estimator following a newly developed one-parameter ridge estimator to handle multicollinearity in the linear regression model. Theoretical and simulation results show that, under some conditions, the proposed estimator performs better than some popular existing estimators in that it has a smaller mean square error. Furthermore, we used real-life data to illustrate the papers …

Truncated Bivariate Kumaraswamy Exponential Distribution, Hanan H. El-Damrawy, A. A. M.Teamah, Basma M. El-Shiekh

Journal of Statistics Applications & Probability

In this paper we derive the truncated bivariate Kumaraswamy exponential distribution considering the truncated points as parameters. We study various mathematical properties as joint moment generating function, conditional moments, survival function, hazard function, cumulative hazard function, reversed hazard function and stress-strength parameter for the proposed truncated model. Some special states are introduced. ALso, estimation for the unknown parameters is discussed by using maximum likelihood estimation method. Finally a real data set is used to illustrate the superiority of our proposed model for fitting these data set over other compared models.

Evaluation Of A Functional Time Series Model For Forecasting Inflation In Uganda, Emong Herbert Robert, Amany Mousa Mohamed, Mahmoud A. Abdel-Fattah

Journal of Statistics Applications & Probability

Inflation is a major economic problem in emerging market economies and requires accurate models to avoid high volatility and long periods of inflation. This paper is aimed at evaluating a Functional Time Series (FTS) model as compared to other models in forecasting inflation in Uganda. The monthly Time Series (TS) data for the general Consumer Price Index (CPI) was used during the period of Jul-2005 to Jun-2020. Box-Jenkins’ Auto Regressive Integrated Moving Average (ARIMA) and Seasonal Autoregressive Integrated Moving Average (SARIMA) methodologies are explored to evaluate the FTS method of forecasting the general CPI where their accuracies are compared and …

An Improved Alternative Method Of Imputation For Missing Data In Survey Sampling, G. N. Singh, Ashok. K. Jaiswal, Chandraketu Singh, M. Usman

Journal of Statistics Applications & Probability

In the present paper, a new and improved method of ratio type imputation and corresponding point estimator to estimate the finite population mean is proposed in case of missing data problem. It has been shown that this estimator utilizes the readily available auxiliary information efficiently and gives better results than the ratio and mean methods of imputation; furthermore, its efficiency is also compared with the regression method of imputation and some other imputation methods, discussed in this article, using four real data sets. A simulation study is carried out to verify theoretical outcomes, and suitable recommendations are made.

Bayesian Estimation Of A One Parameter Akshaya Distribution With Progressively Type Ii Censord Data, Ahlam H.Tolba, Ehab M. Almetwally, Dina A. Ramadan

Journal of Statistics Applications & Probability

A progressively type-II right censored sample has been examined in this paper for the inference about parameters for the one-parameter Akshaya distribution. As point estimates for the parameter, the maximum likelihood estimate (MLE), and Bayesian estimate are obtained. The asymptotic distribution of MLE is obtained. Also, the approximate confidence intervals (ACIs) and bootstraps confidence intervals for unknown parameter are obtained. Further, for symmetric loss functions such as squared error loss function, Bayesian estimates are obtained. Gibbs within Metropolis–Hasting samplers use the Monte Carlo chain (MCMC) technique to get the estimate of the unknown parameter from Bayes algorithm is used and …

Solving Bi-Level Multi-Objective Quadratic Programming Problem With Neutrosophic Parameters In Objective Functions And Constraints Using Fuzzy Approach, O. E. Emam, A. Abdo, A. M. Youssef

Journal of Statistics Applications & Probability

This paper aims to present the neutrosophic technique and fuzzy approach to determine the preferred compromise solution for bi-level multi-objective quadratic programming problem with neutrosophic parameters in both the objective functions and constraints. The introduced technique starts firstly to convert the neutrosophic parameters that exist in the objective functions to crisp numbers then convert the neutrosophic parameters that exist in the constraints to crisp numbers. After that, we applied the fuzzy approach to determine the optimal solution for our bi-level multi-objective quadratic programming problem (BLMOQP). Keywords:

Reproductive Behaviors’ Determinants In Greater Cairo’S Slums, Among Middle Aged Female, 2014, Sameer Abo Raya, Abd El–Ghani Mohamed, Mohamed Naguib

Journal of Statistics Applications & Probability

At a time when Egypt is suffering from the high population increase, which may be one of the biggest challenges facing Egypt, we find a rapid spread of informal areas in Egypt, that represent about 37.5% of the total urban mass in the Republic of Egypt. The study aimed to study the level and trends of reproduction of the population in slums in Greater Cairo, and change in the speed and density of fertility among slum dwellers. We used advanced statistical analysis of field study data for a sample consisting of 667 households, and 595 women of childbearing age eligible …

Profile Monitoring For Com-Poisson Responses, El-Housainy A. Rady, Hadel Z. Ahmed, S. M. Mohamed

Journal of Statistics Applications & Probability

In real case problems, the relationship between the response variable and one or more explanatory variables is called profile that should be monitored over time instead of the quality characteristic itself. Profile monitoring is used in such instances. Many researches have been done in profile monitoring but most of them assumed that the response variable follows normal distribution. In this paper, we will obtain the form of the Sum Com-Poisson likelihood equation and the parametric estimation. For a random sample Y1. . . YN, where P(Yi = yi | λ, ν,m), i = 1, . . . ,N. where the …

On Compare Robust Wilks’ Statistics For The One-Way Manova: A Simulation Study And Application, Abdullah A. Ameen, Osama H. Abbas

Journal of Statistics Applications & Probability

The classical Wilks’ statistic is mostly used to test hypotheses in the one-way multivariate analysis of variance (MANOVA), which is highly sensitive to the effects of outliers. The non-robustness of the test statistics based on normal theory has led many authors to examine various options. In 2010, Todorov and Filzmoser proposed a robust Wilks’ statistic depends on reweighted minimum covariance determinant estimator (RMCD) and constructed its approximate distribution. In this paper, we presented a robust version of the Wilks’ statistics based on reweighted minimum covariance determinant estimator and reweighted minimum volume ellipsoid estimator, and constructed it’s another approximate distribution depends …

A New Discrete Mean Residual Life Order And Its Reliability Applications, Karim Rashad Ashour, A-Hadi N. Ahmed

Journal of Statistics Applications & Probability

The purpose of this paper is to introduce study and analyze a new stochastic order that lies in the framework of the discrete mean residual life and the convexity orders. Several preservation properties of the new order under reliability operations of monotone transformation, mixture, weighted distributions and shock models are discussed. In addition, two characterization properties of the new order based on the concept of discrete residual life at random time and the concept of excess lifetime in discrete renewal processes are given. Finally, we introduce some new applications of this order in the context of reliability theory.

Statistical Inferences Of Reduced Modified Weibull Distribution Under Progressive Type-Ii Censoring Data, Saad J. Almalki, Gamal. A. Abd-Elmougod, Maie J. Al-Malki

Journal of Statistics Applications & Probability

In reliability engineering and lifetime analysis many applications required a bathtub shaped or increasing hazard rate function. In this paper, we considered a reduced form of the new modified Weibull (NMW) distribution when the data are presented in the form of progressive type-II censoring data. The parameter estimators under maximum likelihood estimation (MLE) for point and approximate confidence interval are presented. Also, Bayesian approach under simulate posterior distribution with the help of MCMC the method is adopted. The developed results discussed with data analysis and assessed with Moto Carlo simulation study.

Empirical Bayes Inference For Rayleigh Distribution, Maryam Al-Ameen, Yahia Abdel-Aty

Journal of Statistics Applications & Probability

This paper proposes the empirical Bayes inference for Rayleigh distribution. The empirical Bayes point estimation of the parameter, reliability and hazard function under symmetric (square error) and asymmetric (linear exponential and general entropy) loss functions are obtained. Besides, the maximum likelihood and Bayes estimators are computed too. The Bayes and empirical Bayes prediction interval also derived, where one and two sample prediction are considered. Numerical computations are established by using the Monto Carlo simulation method where the mean square errors are derived to assess and make comparisons among different estimators. The study was constructed based on progressively type-II censoring scheme.

Youth Empowerment In The Context Of Achieving The Objectives Of Sustainable Development In Egypt, Sherif Gamal, Hesham Makhlouf, Mona Khalifa

Journal of Statistics Applications & Probability

Although young people in Egypt (15-29) represent about 27% of the total population (Central Authority for Public Mobilization and Statistics, 2017), many studies have shown that so far this enormous human potential has not been taken advantage of and serious and effective steps have not yet been taken towards empowering young people, and until sustainable development is achieved - the post-2015 agenda associated with the empowerment of young people in Egypt, there must be young people who can and will be able to change. During the development of a national strategy for youth empowerment and activation, one of the most …

Burr Lindley Distribution: Properties, Estimation And Applications, W. A. Hassanein, S. M. Yehia

Journal of Statistics Applications & Probability

In this paper, Burr Lindley (BL) distribution is constructed as a composition structure between Lindley and Burr distributions to induce a more flexible model for the hydrology data than its parents where it has decreasing and inverted bathtub shapes for the hazard rate function. Several statistical and reliability properties of the BL distribution are obtained, such as the behavior of its density and hazard rate functions, survival and residual life functions, Shannon entropy, limiting distributions and characterization via right truncated moments. For parameter estimation, the maximum likelihood estimators as well as the Fisher information matrix are investigated. Moreover, the simulation …

Indian Higher Education In World University Rankings – The Importance Of Reputation And Branding, Ashwin Jerome Fernandes, Balvinder Shukla, Habib Fardoun

Journal of Statistics Applications & Probability

Branding in higher education gives institutions an identity that locates them in the social world. Although the promotion of branding assists in innovative ways to promote the development of a product or service, the contribution is equally as important as recognizing that branding goes beyond the promotion. Branding essentially holds corporations and institutions, such as higher education institutions, accountable for the worth of the product or service they offer. Branding is the intangible feature an organisation or institution upholds and delivers. The implications of branding initiatives in higher education are shown to be beneficial in the overall success of an …

Discrete Mean Inactivity Time Function, Associated Orderings, And Classes Of Life Distributions, Karim Rashad Ashour, El Sayed Ahmed El Sherpieny, A-Hadi N. Ahmed

Journal of Statistics Applications & Probability

The concept of mean inactivity time plays an important role in reliability and life testing. In this investigation, based on the comparison of mean inactivity times of a certain function of two lifetime random variables, we introduce and study a new stochastic order. This new order lies between the reversed hazard rate and the mean inactivity time orders. Several characterizations and preservation properties of the new order under reliability operations of monotone transformation, mixture, and shock models are discussed. In addition, a new class of life distributions called strong increasing mean inactivity time is proposed, and some of its reliability …

Alzoubi Distribution: Properties And Applications, Mohammed Benrabia, Loai M. A. Alzoubi

Journal of Statistics Applications & Probability

In this article, a new two parameters distribution named Alzoubi distribution (AzD) is suggested. Its moments have been obtained. Reliability analysis including hazard rate, cumulative hazard rate and reversed hazard rate functions and the entropy have been discussed, the deviation about mean and median is derived, and the distribution of order statistics is obtained. A simulation study is performed to estimate the model parameters using the maximum likelihood and the ordinary and weighted least squares methods. The goodness of fit to real data set shows the superiority of the new distribution.

Accelerated Life Testing For Bivariate Distributions Based On Progressive Censored Samples With Random Removal, El-Sayed A. El-Sherpieny, Hiba Z. Muhammed, Ehab M. Almetwally

Journal of Statistics Applications & Probability

The significance of the statistical inference problem in reliability theory for the bivariate models under accelerated life testing (ALT) is enormous. In practice, independent variables are assumed for the sake of convenience, which contradicts the nature of the problem. The constant stress accelerated life testing (CS-ALT) for the bivariate model based on copula function is introduced in this study. The copula is the method that describes the dependence structure between variables. The model parameters are evaluated using maximum likelihood and Bayesian estimation methods, taking into account that units fail due to only two dependent variables under continuous stress ALTs and …

The Changes To Cultural Identity In Expatriates And Their Effects On The Efl Community, Kelly Nault

MA TESOL Collection

Expatriates are a group of unique individuals in terms of cultural identity. This paper will first look at the research on expats in-depth and explore the question of what defines cultural identity. Then, it will look into the reality facing expatriates and the formation and the evolution of their cultural identity. Lastly, it will look at how the assumptions about expatriates' cultural identity impact the EFL teaching community.

Trauma-Informed Teaching Practices Post-Covid: A Classroom Action Project, Jillian Weemaes

MA TESOL Collection

Out of recognition of experienced trauma, trauma-informed practices have existed in schools and classrooms long before the start of the pandemic and will continue to exist and evolve after. Programs need to evolve due to the changing nature of the pandemic such as the possibility of teachers experiencing trauma alongside their students, and distance learning complicating the ability of students to make connections with peers, teachers, and administrators. Limited literature currently exists in the field showcasing how teachers have changed and updated their practices since the start of the pandemic. The objective of this action research is to add to …

Spectral Signatures Of Hydrogen Thioperoxide (Hosh) And Hydrogen Persulfide (Hssh): Possible Molecular Sulfur Sinks In The Dense Ism, Charles Z. Palmer, Ryan C. Fortenberry, Joseph S. Francisco

Faculty and Student Publications

For decades, sulfur has remained underdetected in molecular form within the dense interstellar medium (ISM), and somewhere a molecular sulfur sink exists where it may be hiding. With the discovery of hydrogen peroxide (HOOH) in the ISM in 2011, a natural starting point may be found in sulfur-bearing analogs that are chemically similar to HOOH: hydrogen thioperoxide (HOSH) and hydrogen persulfide (HSSH). The present theoretical study couples the accuracy in the anharmonic fundamental vibrational frequencies from the explicitly correlated coupled cluster theory with the accurate rotational constants provided by canonical high-level coupled cluster theory to produce rovibrational spectra for use …

Search For Charged Lepton Flavor Violating Decays Of ϒ (1s), S. Patra, V. Bhardwaj, K. Trabelsi, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, K. Belous, J. Bennett, M. Bessner, B. Bhuyan, T. Bilka, A. Bobrov

Faculty and Student Publications

We present a search for the charged lepton-flavor-violating decays ϒ(1S) →ℓ±ℓ′∓ and radiative charged lepton-flavour-violating decays ϒ(1S) → γℓ±ℓ′∓ [ℓ,ℓ′ = e, μ, τ] using the 158 million ϒ(2S) sample collected by the Belle detector at the KEKB collider. This search uses ϒ(1S) mesons produced in ϒ(2S) → π+π− ϒ(1S) transitions. We do not find any significant signal, so we provide upper limits on the branching fractions at the 90% confidence level. [Figure not available: see fulltext.]

Deficits In Health Literacy And Inadequacies Of Specialized Health Care In The South For Deaf And Hard Of Hearing Patients, Kaleb Kittrell

Poster Presentations

Honors Thesis poster presentation.

Health literacy is a constantly evolving concept that requires similarly evolving adaptation and specialization of health care to increase the quality of life for all. One demographic that is largely ignored when it comes to research in health literacy, specifically in the traditional South, is the d/Deaf and hard of hearing/Hard of Hearing (DHH) population. The purpose of this study is to determine the general health literacy of this specific demographic and compare results with that of other demographics to highlight the anticipated deficit in health literacy levels and emphasize the critical need for specialized care. …

The Impacts Of Cooperative Learning In Classrooms On Student Social Skills, Joseph Larson

Master's Theses

This mixed-methods action research study investigates potential effects of cooperative learning strategies on observed and self-reported student social skills in a fourth grade classroom. Baseline data is collected at a time when the classroom is predominantly whole-group and is then compared to ensuing data collected during and after cooperative learning interventions. Opportunities for students to work in interdependent partnerships and small groups ramps up gradually and culminates in a 3-week period which includes 3 different jigsaw-style lesson activities. Data suggests that students who are unaccustomed to working with peers may struggle to exhibit required social skills that make cooperative learning …

The Impact Of Peer Tutoring On Elementary Students’ Mathematical Education, Kristen Clapp

Master's Theses

This action research study utilized a mixed-methods approach to determine the impact peer tutoring can have in mathematical instruction within a fourth-grade classroom. Data was collected using student-surveys, personal journal entries, and student work samples over the course of a four-week time frame. Report findings show both unchanged and positive impacts in students’ achievement in math as well as data supporting the idea that students who present high mathematical comprehension prior to the study result in no significant impact in mathematical achievement through peer tutoring. This study also displays how student skill and personalities impact effectiveness and ineffectiveness in mathematical …

Trusting Your Bearings: Outdoor Navigation And The Link Between Perceived Competence, Actual Skill, And Flow State In The Adirondack Region Of New York, Daria Stacy

Master's Theses

The purpose of this study was to examine the relationship between perceived competence and flow theory in the activity of outdoor navigation. This relationship was examined at beginner, intermediate, advanced, and expert skill levels of navigation, targeting a population in the Adirondack Region due to its challenging, thickly forested terrain. The study used a multi-method approach encompassing both quantitative and qualitative data. Surveys were administered to examine beginner, intermediate, and advanced navigators following a formal navigation course at SUNY Cortland’s Outdoor Education Practicum at Raquette Lake or an Advanced Map and Compass Bushwhack Course or Map and Compass Fundamentals Course …