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Dr. Adefemi T A J U D E E N Adeniran
  • Department of Statistics, Faculty of Science, University of Ibadan, Ibadan,  Oyo State, Nigeria.
  • +234(0)8035529045
  • Adeniran Adefemi Tajudeen received the PhD degree in Statistics of University of Ibadan, Ibadan, Nigeria. He also hol... moreedit
  • Professor Ademola Adeoye SODIPO, Prof G. N. Amahia, Professor O.I. Shittu, Prof. O.E. Olubusoyeedit
Antenatal Care (ANC) among pregnant women is one of the greatest important factors in reducing maternal morbidity, mortality, birth injuries and other puerperal issues. In this paper, factors affecting utilization of ANC services,... more
Antenatal Care (ANC) among pregnant women is one of the greatest important factors in reducing maternal morbidity, mortality, birth injuries and other puerperal issues. In this paper, factors affecting utilization of ANC services, availability of these services, women perception towards it, level of awareness, attendance rate, sources and types of information on antenatal care services among women of reproductive age were investigated. Descriptive analysis such as tables, pie and bar charts was used for the presentation of sociodemographic and research variables. The test of hypotheses (test of association) between women use of ANC health-services and some demographic variables such as age, education, spouse education, religion and others was also carried out at 5% level of significance.
Research Interests:
Graphical method and mathematical formula are the two approaches for estimating measures of location. Understanding of many instructors of introductory statistics classes are: mean cannot be graphically determined and numerical (formula)... more
Graphical method and mathematical formula are the two approaches for estimating measures of location. Understanding of many instructors of introductory statistics classes are: mean cannot be graphically determined and numerical (formula) approach is more precise than geometrical technique. Contrary to their understanding, this study estimate mean of a dataset geometrically (from histogram) by determining the centroid of histogram drawn from such data set. In addition, we also make known that mathematical formulas for mean, median and mode were derived geometrically (either from ogive or histogram). Finally, the research illustrated the two techniques with a survey data and established that the two approaches produce same results.
Research Interests:
The analysis of survey data becomes difficult in the presence of missing data. By the use of Least Squares and Stein Rule method, estimator for the parameters of interest can be obtained. In this study, proposed convoluted Weighted Least... more
The analysis of survey data becomes difficult in the presence of missing data. By the use of Least Squares and Stein Rule method, estimator for the parameters of interest can be obtained. In this study, proposed convoluted Weighted Least Squares and Stein Rule method is compared with some existing techniques where the data is considered missing completely at random (MCAR). The results show that other techniques are occasionally useful in estimating most of the parameter, but proposed (LSSR) technique perform better regardless of the percentage of the missing data under MCAR assumption.
The purpose of this work is to introduce a new iteration called the modified Picard-S-AK hybrid iterative scheme for approximating fixed point for Banach contractive maps. We show that our scheme converges to a unique fixed point p at a... more
The purpose of this work is to introduce a new iteration called the modified Picard-S-AK hybrid iterative scheme for approximating fixed point for Banach contractive maps. We show that our scheme converges to a unique fixed point p at a rate faster than the recent AK iterative scheme for Banach contractive maps. Furthermore, using Java programming language, we give some numerical examples to justify our claim. Stability and data dependence of the proposed scheme are also explored.
This paper evaluates the performance of ATM machine in Nigeria banking sector using queue theory model. A few simple queues-models were analysed in terms of steady-state derivation. Theoretical formulations and results (with real-life... more
This paper evaluates the performance of ATM machine in Nigeria banking sector using queue theory model. A few simple queues-models were analysed in terms of steady-state derivation. Theoretical formulations and results (with real-life dataset) were established for queue models with Poisson arrivals and exponential service durations. Derivation and calculation of some performance measure including the average queue length, average waiting time in the queue and in the system, and the probability of encountering the system in certain states such as empty, full having an available server or having to wait a certain time to be served were explored under single and multi-server. FIFO (first in, first out) queue discipline was adopted. Keywords: Steady state, waiting-time, queue-discipline, multi-severs, FIFO (first in, first out).
Objective: This paper examines and upgrades a two-parameter double exponential distribution to a four-parameter beta double exponential model by compounding the baseline distribution and beta link function to fits and analyse deaths-cases... more
Objective: This paper examines and upgrades a two-parameter double exponential distribution to a four-parameter beta double exponential model by compounding the baseline distribution and beta link function to fits and analyse deaths-cases data set of the recent outbreak of the global pandemic coronavirus disease (COVID-19) for both Africa and Non-Africa countries. The new proposed model, although complex in its mathematical structure, yet flexible to implement and its robustness to accommodate non-normal data is an extra advantage to statistical theory and other fields. Methodology: The statistical properties: the density function, cumulative distribution function, survival function, hazard function, moments, moments generating function, skewness and kurtosis of the developed model were presented. Maximum likelihood method is used for parameters estimation procedure. The new model is validated and compared with some frontier similar extant parametric family of beta distributions usi...
In this paper, we proposed a new Randomized Response Model (RRM) that estimate proportion of people in a population (P) belonging to a sensitive group (S) under study. Simple random sampling with replacement and stratified simple random... more
In this paper, we proposed a new Randomized Response Model (RRM) that estimate proportion of people in a population (P) belonging to a sensitive group (S) under study. Simple random sampling with replacement and stratified simple random sampling scheme were adopted. Maximum likelihood and Bayesian estimation procedures of the proposed model were developed and compared. The sampling distribution (expectation and variance) of the proposed estimator under the two sampling techniques, efficiency comparison of the proposed model with some existing models, and numerical illustration of all the compared models were also explored. We found that the proposed model outperformed other existing RRMs in terms of efficiency and it proved to be more protective in designing survey for sensitive related issues.
Antenatal Care (ANC) among pregnant women is one of the greatest important factors in reducing maternal morbidity, mortality, birth injuries and other puerperal issues. In this paper, factors affecting utilization of ANC services,... more
Antenatal Care (ANC) among pregnant women is one of the greatest important factors in reducing maternal morbidity, mortality, birth injuries and other puerperal issues. In this paper, factors affecting utilization of ANC services, availability of these services, women perception towards it, level of awareness, attendance rate, sources and types of information on antenatal care services among women of reproductive age were investigated. Descriptive analysis such as tables, pie and bar charts was used for the presentation of socio-demographic and research variables. The test of hypotheses (test of association) between women use of ANC health-services and some demographic variables such as age, education, spouse education, religion and others was also carried out at 5% level of significance.