Emmanuel John Ekpenyong
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View article: Assessing the Efficiencies of Calibration Ratio Estimators for Estimating Mean Weight of Babies in the Presence of Gestational Age Under Stratified Random Sampling
Assessing the Efficiencies of Calibration Ratio Estimators for Estimating Mean Weight of Babies in the Presence of Gestational Age Under Stratified Random Sampling Open
This study compares the performance of various calibration ratio estimators in estimating the mean weight of newborn babies at the maternity ward of Federal Medical Centre (FMC), Umuahia, Abia State Nigeria, under stratified random samplin…
View article: Evaluating The Performances of Estimators of Population Mean Weight of Babies in FMC, Imo State Under Simple Random Sampling Scheme
Evaluating The Performances of Estimators of Population Mean Weight of Babies in FMC, Imo State Under Simple Random Sampling Scheme Open
Gestational age plays a vital role in obstetrics. Accurately estimating the average gestational age in pregnant women will help ascertain the growth of the fetus and it is also essential in structuring prenatal care, including decisions ab…
View article: Modified Classes of Stratified Exponential Ratio Estimators of Population Mean with Equal Optimal Efficiency
Modified Classes of Stratified Exponential Ratio Estimators of Population Mean with Equal Optimal Efficiency Open
This paper introduces new classes of exponential ratio estimators for population mean and derives expressions for their biases and mean square errors (MSEs) under the large sample approximation. Asymptotic optimum estimator and its approxi…
View article: Efficient class of ratio cum median estimators for estimating the population median
Efficient class of ratio cum median estimators for estimating the population median Open
In estimation theory, the use of auxiliary information significantly improves precision while estimating population parameters. In this paper, an efficient class of ratio cum median estimators of the population median is suggested using si…
View article: A New Robust Bootstrapped Singular Value Decomposition Algorithm Using the Sample Myriad Estimate
A New Robust Bootstrapped Singular Value Decomposition Algorithm Using the Sample Myriad Estimate Open
Singular value decomposition (SVD) of rectangular datasets has proved to be a useful multivariate data decomposition approach because of its ability to decompose both square and rectangular matrices. Choi & Huh (1996) SVD approach utilizes…
View article: The Effect of Activation Functions in a Chest X-ray Image Classification
The Effect of Activation Functions in a Chest X-ray Image Classification Open
The choice of activation functons is very important in deep learning. This is because activation functions are capable of capturing non-linear patterns in a data. The most popular actiavtion function is the Rectified Linear Unit (ReLU) but…
View article: The Prevalence, Pattern, and Predictors of Sleep Disorders among Pregnant Women Attending Antenatal Clinic in a Southern Nigerian City
The Prevalence, Pattern, and Predictors of Sleep Disorders among Pregnant Women Attending Antenatal Clinic in a Southern Nigerian City Open
Background: Sleep disorders are a common and often undiagnosed chronic health problem associated with an increased incidence of metabolic syndrome and pregnancy complications. Aim: The purpose of this study was to find out how common sleep…
View article: MODERATING THE EFFECT OF ORGANISATIONAL CULTURE ON EMPLOYEE MOVEMENT AND SUSTAINABILITY OF NIGERIAN COMMERCIAL BANKS
MODERATING THE EFFECT OF ORGANISATIONAL CULTURE ON EMPLOYEE MOVEMENT AND SUSTAINABILITY OF NIGERIAN COMMERCIAL BANKS Open
Sustainability of commercial banks in Nigeria has, in recent decades, been threatened by the increasing mass exodus of employee movement due largely to the seemly lack of job security, poor remuneration, management style, and growing organ…
View article: TOURISM MANAGEMENT: A PANACEA FOR SUSTAINABILITY OF HOSPITALITY INDUSTRY
TOURISM MANAGEMENT: A PANACEA FOR SUSTAINABILITY OF HOSPITALITY INDUSTRY Open
The aim of the study is to examine the effect of tourism management as a panacea for sustainability of hospitality industry in Nigeria. The study applied a quantitative method involving a survey design. A questionnaire measurement instrume…
View article: Generalized Class of Mean Estimators with Known Measures for Outliers Treatment
Generalized Class of Mean Estimators with Known Measures for Outliers Treatment Open
In estimation theory, the researchers have put their efforts to develop some estimators of population mean which may give more precise results when adopting ordinary least squares (OLS) method or robust regression techniques for estimating…
View article: Imputation of Missing Values in Economic and Financial Time Series Data Using Five Principal Component Analysis (PCA) Approaches
Imputation of Missing Values in Economic and Financial Time Series Data Using Five Principal Component Analysis (PCA) Approaches Open
This study assessed five approaches for imputing missing values. The evaluated methods include Singular Value Decomposition Imputation (svdPCA), Bayesian imputation (bPCA), Probabilistic imputation (pPCA), Non-Linear Iterative Partial Leas…
View article: A critique of the bureaucratic theory: the Nigerian civil service experience
A critique of the bureaucratic theory: the Nigerian civil service experience Open
This paper presents a critique of the bureaucratic theory: The Nigerian Civil Service experience. The descriptive research approach was adopted for the study and the questionnaire instrument was used in data collection. Descriptive statist…
View article: Crafts industry lifecycle strategies and entrepreneurial development in Ikot Ekpene Senatorial District of Akwa Ibom State
Crafts industry lifecycle strategies and entrepreneurial development in Ikot Ekpene Senatorial District of Akwa Ibom State Open
The study evaluates crafts industry life cycle strategies and entrepreneurial development in Ikot Ekpene Senatorial District of Akwa Ibom State. The survey research design was adopted and a sample size of 265 was determine for the study us…
View article: The potency of feasibility analysis on business survival in Cross River State Southern Senatorial District, Nigeria
The potency of feasibility analysis on business survival in Cross River State Southern Senatorial District, Nigeria Open
This study seeks to evaluate the relevance of feasibility analysis on business survival in Cross River State Southern Senatorial district. The survey research design was adopted for this study. A population of 82 entrepreneur/owners of sac…
View article: Missing Value Estimation in a Nested-Factorial Design with Three Factors
Missing Value Estimation in a Nested-Factorial Design with Three Factors Open
When faced with unbalanced data, it is often necessary to estimate the necessary missing values before the application of the analysis of variance technique. Previous studies have shown that different designs require different missing valu…
View article: A Modified Replacement Model for Items That Fail Suddenly with Variable Replacement Costs
A Modified Replacement Model for Items That Fail Suddenly with Variable Replacement Costs Open
Several researches have been done to provide better alternative to the existing replacement models, but the research works did not adequately address the replacement problem for items that fail suddenly. Hence, a modified replacement model…
View article: Efficiency of Some Estimation Methods of the Parameters of a Two-Parameter Pareto Distribution
Efficiency of Some Estimation Methods of the Parameters of a Two-Parameter Pareto Distribution Open
This work considered the estimation of the parameters of a two-parameter Pareto distribution. Four methods of estimation namely, the Methods of Moments (MM), Methods of Maximum Likelihood (MLE), Methods of Least Squares (OLS) and Ridge Reg…
View article: Bayes estimation of the shape parameter of burr type XII distribution with generalised squared error loss and linex loss functions under some prior distributions
Bayes estimation of the shape parameter of burr type XII distribution with generalised squared error loss and linex loss functions under some prior distributions Open
In this paper, we obtain some classical and Bayes estimators of the shape parameters of the Burr Type XII distribution. The Bayes estimation was made under generalized squared error loss function (GSELF) and linear exponential (LINEX) loss…
View article: A modified class of exponential-type estimator of population-mean in simple random sampling
A modified class of exponential-type estimator of population-mean in simple random sampling Open
The problem of obtaining better ratio estimators of the population means are dominating in survey sampling. This paper provides a modified class of exponential type estimators using combinations of some existing estimators. Expressions for…
View article: Short-Term Forecasting of Nigeria Inflation Rates Using Seasonal ARIMA Model
Short-Term Forecasting of Nigeria Inflation Rates Using Seasonal ARIMA Model Open
This paper considers the analyses and forecasting of the monthly All-items (Year-on-Year change) Inflation Rates in Nigeria. The data used for this study are monthly All-items Inflation rates from 2000 to 2015 collected from the Central Ba…
View article: Analysis of deaths in a Nigerian hospital: the case of Federal Medical Centre (FMC), Umuahia
Analysis of deaths in a Nigerian hospital: the case of Federal Medical Centre (FMC), Umuahia Open
A Poisson regression model was fitted to the causes of death in Federal Medical Center (FMC), Umuahia. The basic violation of the model which is over-dispersion was confirmed absent with the use of a plot of residual against fitted values,…