Department of Statistics, Federal University of Technology Owerri, Owerri, Nigeria - Articles

A Class of Estimators for Population Ratio in Simple Random Sampling Using Variable Transformation (Articles)

A. C. Onyeka, V. U. Nlebedim, C. H. Izunobi

Open Journal of Statistics Vol.4 No.4，June 20, 2014

DOI: 10.4236/ojs.2014.44029 3,395 Downloads 6,091 Views Citations
Estimation of Population Ratio in Post-Stratified Sampling Using Variable Transformation (Articles)

Aloy Chijioke Onyeka, Chinyeaka Hostensia Izunobi, Iheanyi Sylvester Iwueze

Open Journal of Statistics Vol.5 No.1，January 20, 2015

DOI: 10.4236/ojs.2015.51001 4,017 Downloads 9,272 Views Citations
Separate-Type Estimators for Estimating Population Ratio in Post-Stratified Sampling Using Variable Transformation (Articles)

Aloy Chijioke Onyeka, Chinyeaka Hostensia Izunobi, Iheanyi Sylvester Iwueze

Open Journal of Statistics Vol.5 No.1，January 30, 2015

DOI: 10.4236/ojs.2015.51004 3,207 Downloads 4,518 Views Citations
The Usefulness of Dynamic Programming in Course Allocation in the Nigerian Universities (Articles)

Harrison O. Amuji, Geoffrey U. Ugwuanyim, Chukwudi J. Ogbonna, Hycinth C. Iwu, Bridget N. Okechukwu

Open Journal of Optimization Vol.6 No.4，December 29, 2017

DOI: 10.4236/ojop.2017.64012 987 Downloads 2,436 Views Citations
Analysis of the Impact of Treasury Single Account on the Performance of Banks in Nigeria (Articles)

Chukwudi J. Ogbonna, Harrison O. Amuji

Open Journal of Statistics Vol.8 No.3，June 7, 2018

DOI: 10.4236/ojs.2018.83029 1,730 Downloads 10,864 Views Citations
Optimal Water Pipe Replacement Policy (Articles)

Harrison O. Amuji, Chukwudi J. Ogbonna, Geoffrey U. Ugwuanyim, Hycinth C. Iwu, Okechukwu B. Nwanyibuife

Open Journal of Optimization Vol.7 No.2，June 8, 2018

DOI: 10.4236/ojop.2018.72002 1,067 Downloads 2,999 Views Citations
On the Paradox of the Duality of Autoregressive and Moving Average Processes (Articles)

Elechi Onyemachi, Iheanyi Sylvester Iwueze, Eleazar Chukwunenye Nwogu

Journal of Applied Mathematics and Physics Vol.10 No.2，February 28, 2022

DOI: 10.4236/jamp.2022.102043 186 Downloads 1,408 Views Citations
Interrupted Time Series Analysis of Military and Civilian Regimes in Nigeria: A Statistical Evidence from Gross Domestic Product (GDP) (Articles)

Desmond Chekwube Bartholomew, Geoffrey Uzodinma Ugwuanyim, Ukamaka Cynthia Orumie, Francis Attah Egwumah

Open Journal of Statistics Vol.13 No.4，August 30, 2023

DOI: 10.4236/ojs.2023.134031 187 Downloads 1,026 Views Citations
Modelling of Pre-Sex Selection: An Effective Method for Family Planning and Control of Overpopulation (Articles)

Harrison O. Amuji, Cecilia N. Aronu, Obioma G. Onukwube, Chinemerem Igboanusi

Open Journal of Optimization Vol.10 No.2，June 17, 2021

DOI: 10.4236/ojop.2021.102003 257 Downloads 1,735 Views Citations
Marketing Mix Optimization in Nigeria’s Brewing Industry: A Regression and Geometric Programming Approach (Case Study of Nigerian Breweries PLC) (Articles)

Geoffrey Uzodinma Ugwuanyim, Harrison Obiora Amuji, Oforegbunam Thaddeus Ebiringa, Donatus Eberechukwu Onwuegbuchunam

Open Journal of Statistics Vol.15 No.2，April 8, 2025

DOI: 10.4236/ojs.2025.152010 61 Downloads 321 Views Citations
Performance Evaluation of Motor Insurance Companies: Panel Data Evidence from Nigeria (Articles)

G. U. Ugwuanyim, D. E. Onwuegbuchunam, D. C. Bartholomew, C. C. Anikpe

Journal of Transportation Technologies Vol.11 No.3，May 19, 2021

DOI: 10.4236/jtts.2021.113021 479 Downloads 2,850 Views Citations
Land Capability Index Mapping for Waste Disposal Landuse Option Using Geographic Information System (GIS) in Enugu Area, South Eastern Nigeria (Articles)

A. A. Onunkwo, Samuel O. Onyekuru, G. I. Nwankwor

Journal of Geographic Information System Vol.4 No.5，November 1, 2012

DOI: 10.4236/jgis.2012.45049 6,410 Downloads 10,520 Views Citations
Assessment of Hazards in Gas Hydrates Recovery (Articles)

Chinedu E. Ejike

Open Journal of Yangtze Oil and Gas Vol.4 No.4，August 7, 2019

DOI: 10.4236/ojogas.2019.44018 1,154 Downloads 3,473 Views Citations
Modeling the Nigerian Bonny Light Crude Oil Price: The Power of Fuzzy Time Series (Articles)

Desmond Chekwube Bartholomew, Ukamaka Cynthia Orumie, Chukwudi Paul Obite, Blessing Iheoma Duru, Felix Chikereuba Akanno

Open Journal of Modelling and Simulation Vol.9 No.4，September 27, 2021

DOI: 10.4236/ojmsi.2021.94024 336 Downloads 1,630 Views Citations
Modeling of Catfish Farm Using Lexicographic Linear Goal Programming (Articles)

Ukamaka Cynthia Orumie, Egenti Francis Nzerem, Chekwube Bartholomew Desmond

American Journal of Operations Research Vol.12 No.3，May 20, 2022

DOI: 10.4236/ajor.2022.123006 297 Downloads 1,336 Views Citations
Monitoring and Evaluation of Air Pollution at Ohaji/Egbema Flow Station and Its Environs via GPS in Ohaji Egbema Lga, Imo State Nigeria (Articles)

Sylvester Obum Anyikwa, Obineche Charles Ndukwe, Theresa Chinwendu Umeojiakor, Pat Chukwudi Nnaji, Ndidiamaka Martina Amadi

Detection Vol.9 No.4，September 30, 2022

DOI: 10.4236/detection.2022.94004 204 Downloads 1,048 Views Citations
Sequence Stratigraphic Analysis of “XB Field”, Central Swamp Depobelt, Niger Delta Basin, Southern Nigeria (Articles)

Samuel Okechukwu Onyekuru, Emmanuel Chukwudi Ibelegbu, Julian Chukwuma Iwuagwu, Akan Godfrey Essien, Casmir Zanders Akaolisa

International Journal of Geosciences Vol.3 No.1，February 28, 2012

DOI: 10.4236/ijg.2012.31027 12,033 Downloads 19,428 Views Citations
Effect of Deposition Temperature on the FTIR Absorbance of Zinc Oxide Thin Films Produced by MOCVD (Articles)

U. S. Mbamara, G. A. Alozie, K. B. Okeoma, C. Iroegbu

Journal of Modern Physics Vol.4 No.3，March 13, 2013

DOI: 10.4236/jmp.2013.43048 5,355 Downloads 8,560 Views Citations
Petrology and Geochemistry of Basement Complex Rocks in Okom-Ita Area, Oban Massif, Southeastern Nigeria (Articles)

Kelechi Denis Opara, Young E. Obioha, Samuel Okechukwu Onyekuru, Chikwendu Okereke, Sabinus Ikechukwu Ibeneme

International Journal of Geosciences Vol.5 No.4，April 24, 2014

DOI: 10.4236/ijg.2014.54038 8,537 Downloads 13,249 Views Citations
Earth Resources Exploitation and Sustainable Development: Geological and Engineering Perspectives (Articles)

C. C. Iwuji, O. C. Okeke, B. C. Ezenwoke, C. C. Amadi, H. Nwachukwu

Engineering Vol.8 No.1，January 21, 2016

DOI: 10.4236/eng.2016.81003 11,044 Downloads 20,817 Views Citations

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