Prof. Adebowale Olusola Adejumo

Adebowale Olusola Adejumo is a Professor in the Department of Statistics, Faculty of Physical Sciences, University of Ilorin, with over 24 years university teaching, research and administrative experience. He has served as the Head of Department and he is the current Faculty Representative in the Postgraduate Board of University of Ilorin. His area of specialization is Statistical Modeling, Biostatistics, Time series and Categorical Data Analysis. He has over ninety national and international publications in reputable outlets covering academic journals, Chapters in books, books, and technical reports and has sole supervised over eighty Masters Dissertations and ten Ph. D. Theses. Prof. Adejumo holds both B.Sc. and M.Sc. degrees in Statistics from University of Ilorin and Ph. D. degree (Dr. rer. nat) in Statistics from Ludwig Maximilians University, Munich, Germany. He is a member of many Professional bodies within and outside Nigeria.
He was a Resource Person at NMC on Time Series

EDUCATION

Ph. D. in Statistics, Ludwig Maximilian University, Munich, Germany
M. SC. in Statistics, University of Ilorin, Ilorin, Nigeria
B. SC. in Statistics, University of Ilorin, Ilorin, Nigeria

RESEARCH, TEACHING, or OTHER INTERESTS

Statistics and Probability, Statistics, Probability and Uncertainty, Modeling and Simulation, Statistics and Probability

Scopus Publications

Geo-additive modelling of children under-five sleeping under Insecticide treated nets in Nigeria
A Ademola Adetunji, A. Justus Ademuyiwa, G. Nihinlolawa Alo, and A. Olusola Adejumo
Springer Science and Business Media LLC



Unique clusters of patterns of breast cancer survivorship
Hilary I. Okagbue, Pelumi E. Oguntunde, Patience I. Adamu, and Adebowale O. Adejumo
Springer Science and Business Media LLC



Modeling Covid-19 Cases in West African Countries: A Comparative Analysis of Quartic Curve Estimation Models and Estimators
Kayode Ayinde, Hamidu Abimbola Bello, Rauf Ibrahim Rauf, Omokova Mary Attah, Ugochinyere Ihuoma Nwosu, Oluwatoyin Kikelomo Bodunwa, Oluwadare Olatunde Ojo, Roseline Oluwaseun Ogundokun, Taiwo Stephen Fayose, Rasaki Yinka Akinbo,et al.
Springer International Publishing



A study of Hepatitis B virus infection using chi-square statistic
Oluwole A Odetunmibi, Adebowale O Adejumo, and Timothy A Anake
IOP Publishing
Abstract Hepatitis B is caused by the hepatitis B virus (HBV) and it affects livers. It has been established that the disease is a serious medical condition caused by an overpowering immune response to infection. To this effect, there is a need for cross examination of records of patients on this disease to ascertain the factors that could be responsible for the survival or dying from this disease. Descriptive analysis of the data showed that sexually active age bracket (31 – 50) are greatly affected by the disease while female accounted for majority of those that are tested positive to the disease. Chi squared statistic was used to test for independence between age and gender of those who tested positive to disease between 2006 and 2015 in Lagos state, Nigeria. It was discovered that, both variables of age and gender are not independent which means there is association between the Age and Gender of HBV patients.


Log-linear modelling of effect of age and gender on the spread of hepatitis B virus infection in Lagos State, Nigeria
Oluwole A. Odetunmibi, Adebowale O. Adejumo, and Timothy A. Anake
Scientific Foundation SPIROSKI
BACKGROUND: The effect of age and gender on the transmission of any infectious disease can be of great important because the age at which the host contact the disease may be a determinant on the rate at which the disease will spread.
 AIM: The purpose of this research is to model the significant effect of age and gender on the spread of hepatitis B virus using data collected from Lagos State, Nigeria.
 MATERIAL AND METHODS: The data that was used for this research is a ten years data covering the period of 2006 to 2015, which was collected from Nigeria Institute of Medical Research (NIMR). A log-linear modelling approach was employed using R programming language software. Akaike Information Criterion (AIC) method of model selection was used in selecting the best model.
 RESULTS: It was discovered from the analysis that both factors (age and gender) have a significant effect on the spread of hepatitis B infection. This means that the age at which an individual is tested positive to hepatitis B virus will affect the spread of the disease. In choosing the best model among the four models that were developed, model AY: GY (age & year: gender and year) was found to be the best model.
 CONCLUSION: Age and gender were found to act as a risk influencer that could have a great effect on the transmission of hepatitis B virus infections in Lagos state, Nigeria.


Data analysis on physical and mechanical properties of cassava pellets
Pelumi E. Oguntunde, Oluyemisi A. Adejumo, Oluwole A. Odetunmibi, Hilary I. Okagbue, and Adebowale O. Adejumo
Elsevier BV



Quantitative evaluation of pregnant women delivery status’ records in Akure, Nigeria
Adebowale O. Adejumo, Esivue A. Suleiman, Hilary I. Okagbue, Pelumi E. Oguntunde, and Oluwole A. Odetunmibi
Elsevier BV



The logistic inverse exponential distribution: Basic structural properties and application




Drying kinetic of industrial cassava flour: Experimental data in view
Oluwole A. Odetunmibi, Oluyemisi A. Adejumo, Pelumi E. Oguntunde, Hilary I. Okagbue, Adebowale O. Adejumo, and Esivue A. Suleiman
Elsevier BV



Breast cancer patients in Nigeria: Data exploration approach
Pelumi E. Oguntunde, Adebowale O. Adejumo, and Hilary I. Okagbue
Elsevier BV



Quantitative exploration of factors influencing psychotic disorder ailments in Nigeria
Adebowale O. Adejumo, Nehemiah A. Ikoba, Esivue A. Suleiman, Hilary I. Okagbue, Pelumi E. Oguntunde, Oluwole A. Odetunmibi, and Obalowu Job
Elsevier BV



Exploration of solar radiation data from three geo-political zones in Nigeria
Adebowale O. Adejumo, Esivue A. Suleiman, and Hilary I. Okagbue
Elsevier BV



An investigation of dynamic influence to doctors' stress in government hospitals in Nigeria using logistic regression approach




Exponential Inverse Exponential (EIE) distribution with applications to lifetime data
Pelumi Emmanuel Oguntunde, Adebowale Olusola Adejumo, and Enahoro Alfred Owoloko
Science Alert



The burr X-exponential distribution: Theory and applications




On the flexibility of the transmuted inverse exponential distribution




The weibull-inverted exponential distribution: A generalization of the inverse exponential distribution




On the exponentiated generalized inverse exponential distribution




A New Generalization of the Lomax Distribution with Increasing, Decreasing, and Constant Failure Rate
Pelumi E. Oguntunde, Mundher A. Khaleel, Mohammed T. Ahmed, Adebowale O. Adejumo, and Oluwole A. Odetunmibi
Hindawi Limited
Developing new compound distributions which are more flexible than the existing distributions have become the new trend in distribution theory. In this present study, the Lomax distribution was extended using the Gompertz family of distribution, its resulting densities and statistical properties were carefully derived, and the method of maximum likelihood estimation was proposed in estimating the model parameters. A simulation study to assess the performance of the parameters of Gompertz Lomax distribution was provided and an application to real life data was provided to assess the potentials of the newly derived distribution. Excerpt from the analysis indicates that the Gompertz Lomax distribution performed better than the Beta Lomax distribution, Weibull Lomax distribution, and Kumaraswamy Lomax distribution.


Statistical properties and applications of a new lindley exponential distribution




Assessment of jebba hydropower dam operation for improved energy production and flood management




A comparative analysis on the performance of the convoluted exponential distribution and the exponential distribution in terms of flexibility
Enahoro Alfred Owoloko, Pelumi Emmanuel Oguntunde, and Adebowale Olusola Adejumo
Science Publications
In this article, the convoluted exponential distribution which was derived as the sum of two independent exponentially distributed random variables was compared with the exponential distribution in terms of flexibility when applied to four real data sets. The idea is to verify if the convoluted exponential distribution would perform better than the exponential distribution in modeling real life situations. Some other basic statistical properties of the convoluted exponential distribution were also identified.


On the exponentiated generalized weibull distribution: A generalization of the weibull distribution
P. E. Oguntunde, O. A. Odetunmibi, and A. O. Adejumo
Indian Society for Education and Environment
Background/Objectives: In this article, a generalization of the Weibull distribution is being studied in some details. The new model is referred to as the Exponentiated Generalized Weibull distribution. The aim is to increase the flexibility of the Weibull distribution. Methods: The concepts introduced in the Exponentiated Generalized family of distributions due to Cordeiro et al.11 were employed. Findings: Some basic mathematical properties of the resulting model were identified and studied in minute details. Meanwhile, estimation of model parameters was performed using the maximum likelihood method. Application/Improvement: The Exponentiated Generalized Weibull distribution was presented as a competitive model that would be useful in modeling real life situations with inverted bathtub failure rates. The R-code for the plots was also provided. Further research would involve applying the proposed model to real life data sets.


Performance rating of the transmuted exponential distribution: an analytical approach
Enahoro A. Owoloko, Pelumi E. Oguntunde, and Adebowale O. Adejumo
Springer Science and Business Media LLC



Drying kinetics of unripe plantain chips using charcoal fuelled cabinet dryer

RECENT SCHOLAR PUBLICATIONS

An Exploration of Nigerian Exchange Rate Using ARIMA Model
A CA, I AK, H BP, OT MS, O BI, P VB, J AS, A AO
Asian Journal of Probability and Statistics 27 (1), 69-80 2025



Analyzing Nigeria Monthly Consumer Price Index Using the ARIMA Model
A CA, J AS, I AK, OT MS, O BI, H BP, P VB, A AO
Asian Research Journal of Mathematics 21 (1), 1-8 2025



Optimizing Lassa Fever Outbreak Control: A Comparative Study on the Efficacy of Contact Tracing Integration in Epidemiological Models
BO Ajala, AO Adejumo, JA Akinyemi, MI Ekum, V Barrah, JU Barrah-Ajala, ...
2024



Some Extended Pareto Type I Distributions
IV Omekam, J Popoola, NF Gatta, AO Adejumo
Ife Journal of Science 24 (2), 265-276 2022



Modified Frechet distributions and their generalized families
IV Omekam, OI Adeniyi, AO Adejumo
Science World Journal 17 (2), 338-245 2022



Geo-additive modelling of children under-five sleeping under insecticide treated nets in Nigeria
AA Adetunji, AJ Ademuyiwa, GN Alo, AO Adejumo
GeoJournal 87 (4), 2479-2490 2022



Unique clusters of patterns of breast cancer survivorship
HI Okagbue, PE Oguntunde, PI Adamu, AO Adejumo
Health and Technology 12 (2), 365-384 2022



Modeling Covid-19 cases in West African countries: a comparative analysis of quartic curve estimation models and estimators
K Ayinde, HA Bello, RI Rauf, OM Attah, UI Nwosu, OK Bodunwa, OO Ojo, ...
Modeling, Control and Drug Development for COVID-19 Outbreak Prevention, 359-454 2022



Modeling Covid-19 Cases in West African Countries: A Comparative Analysis of Quartic Curve Estimation
K Ayinde, HA Bello, RI Rauf, OM Attah, UI Nwosu, RY Akinbo, ...
Modeling, Control and Drug Development for COVID-19 Outbreak Prevention 366, 359 2021



Flexibility of Generalized Distributions
IV Omekam, AO Adejumo
Royal Statistical Society Nigeria Local Group Annual Conference Proceedings 2021



A study of Hepatitis B virus infection using chi-square statistic
OA Odetunmibi, AO Adejumo, TA Anake
Journal of Physics: Conference Series 1734 (1), 012010 2021



Cubic Transmuted Lindley as a Better Distribution in the Family of Rayleigh Distributions
A Adefowope, I Omekam, A Adejumo
" Tibiscus" University of Timişoara, Romnia 2020



Goodness of Fit Tests for Some Generalized Distributions
I Omekam, A Adejumo
Federal University Wukari, Taraba State, Nigeria 2020



Log-linear modelling of effect of age and gender on the spread of hepatitis b virus infection in Lagos state, Nigeria
OA Odetunmibi, AO Adejumo, TA Anake
Open Access Macedonian Journal of Medical Sciences 7 (13), 2204 2019



Time series anaalysis of brent crude oil prices per barrel: a Box-Jenkins approach
AO Adejumo, J Daniel
Ann. Comput. Sci. Ser 17 (1), 87-101 2019



A modified ratio techniques in successive sampling on two occasions
KO Adetunji, AO Adejumo
Tibiscus" University of Timişoara, Romnia 2019



Log-Linear Modelling of Effect of Age and Gender on the Spread of Hepatitis B Virus Infection in Lagos State, Nigeria. Open Access Maced J Med Sci. 2019 Jul 15; 7 (13): 2204-2207
OA Odetunmibi, AO Adejumo, TA Anake
2019



A Useful Extension of the Inverse Exponential Distribution
PE Oguntunde, AO Adejumo, MA Khaleel, EA Owoloko, HI Okagbue, ...
Transactions on Engineering Technologies: 25th World Congress on Engineering 2019



The logistic inverse exponential distribution: Basic structural properties and application
PE Oguntunde, AO Adejumo, MA Khaleel, HI Okagbue, OA Odetunmibi
Proceedings of the World Congress on Engineering and Computer Science 2 2018



Parameter estimation and reliability, hazard functions of Gompertz Burr Type XII distribution
MK Abdal-hameed, MA Khaleel, ZM Abdullah, PE Oguntunde, ...
University of Tikrit-Faculty of Management and Economics 2018

MOST CITED SCHOLAR PUBLICATIONS

A new generalization of the Lomax distribution with increasing, decreasing, and constant failure rate
PE Oguntunde, MA Khaleel, MT Ahmed, AO Adejumo, OA Odetunmibi
Modelling and Simulation in Engineering 2017 (1), 6043169 2017
Citations: 92



Performance rating of the transmuted exponential distribution: an analytical approach
EA Owoloko, PE Oguntunde, AO Adejumo
SpringerPlus 4, 1-15 2015
Citations: 90



The transmuted inverse exponential distribution
PE Oguntunde, AO Adejumo
International journal of advanced statistics and probability 3 (1), 1-7 2015
Citations: 89



Statistical properties of the exponentiated generalized inverted exponential distribution
PE Oguntunde, A Adejumo, OS Balogun
Applied Mathematics 4 (2), 47-55 2014
Citations: 70



On the sum of exponentially distributed random variables: A convolution approach
PE Oguntunde, OA Odetunmibi, AO Adejumo
European Journal of Statistics and Probability 2 (1), 1-8 2014
Citations: 52



Application of ordinal logistic regression in the study of students’ performance
AO Adejumo, AA Adetunji
Mathematical Theory and Modeling 3 (11), 10-19 2013
Citations: 52



The Gompertz inverse exponential (GoIE) distribution with applications
PE Oguntunde, MA Khaleel, AO Adejumo, HI Okagbue, AA Opanuga, ...
Cogent Mathematics & Statistics 5 (1), 1507122 2018
Citations: 42



Breast cancer patients in Nigeria: data exploration approach
PE Oguntunde, AO Adejumo, HI Okagbue
Data in brief 15, 47 2017
Citations: 40



On the exponentiated generalized inverse exponential distribution
PE Oguntunde, AO Adejumo, EA Owoloko
World Congress on Engineering, London 2017
Citations: 40



Statistical properties and applications of a new Lindley exponential distribution
P Oguntunde, A Adejumo, H Okagbue, M Rastogi
Gazi University Journal of Science 29 (4), 831-838 2016
Citations: 38



Diabetic care in Nigeria: report of a self-audit
EO Okoro, AO Adejumo, BA Oyejola
Journal of Diabetes and its Complications 16 (2), 159-164 2002
Citations: 37



Exponential inverse exponential (EIE) distribution with applications to lifetime data
PE Oguntunde, AO Adejumo, EA Owoloko
Asian Journal of Scientific Research 10 (3), 169-177 2017
Citations: 36



Application of Kumaraswamy inverse exponential distribution to real lifetime data
PE Oguntunde, AO Adejumo, EA Owoloko
International Journal of Applied Mathematics and Statistics 56 (5), 34-47 2017
Citations: 36



The generalized inverted generalized exponential distribution with an application to a censored data
PE Oguntunde, AO Adejumo
Journal of Statistics Applications & Probability 4 (2), 223 2015
Citations: 34



On the exponentiated generalized Weibull distribution: A generalization of the Weibull distribution
PE Oguntunde, OA Odetunmibi, AO Adejumo
Indian Journal of Science and Technology 8 (35), 1-7 2015
Citations: 33



A study of probability models in monitoring environmental pollution in Nigeria
PE Oguntunde, OA Odetunmibi, AO Adejumo
Journal of Probability and Statistics 2014 (1), 864965 2014
Citations: 32



Quantitative exploration of factors influencing psychotic disorder ailments in Nigeria
AO Adejumo, NA Ikoba, EA Suleiman, HI Okagbue, PE Oguntunde, ...
Data in brief 14, 175-185 2017
Citations: 23



The Weibull-inverted exponential distribution: A generalization of the inverse exponential distribution
PE Oguntunde, AO Adejumo, EA Owoloko
World Congress on Engineering 2017
Citations: 22



Assessing the flexibility of the exponentiated generalized exponential distribution
PE Oguntunde, AO Adejumo, KA Adepoju
Pacific Journal of Science and Technology 17 (1), 49-57 2016
Citations: 21



Development and evaluation of a cassava chipping machine
AO Adejumo, OB Oradugba, TA Ilori, MO Adenekan
Journal of Engineering and Applied Sciences 3, 43-51 2011
Citations: 21

CONSULTANCY

National Mathematical Centre, Abuja, Nigeria

Industry, Institute, or Organisation Collaboration

National Mathematical Centre, Abuja