Publications
- Okafor Ikechukwu Boniface, Onyeka Aloysius Chijioke, C.J. Ogbonna, Izunobi Chinyeaka Hostensia
and Kiwu Lawrence Chizoba (2022). The Influence of Measurement Errors on Generalized Estimator
of Population Mean. Asian Journal of Probability and Statistics Vol.16(4), 77–92.
- Okafor Ikechukwu Boniface, Onyeka Aloysius Chijioke, Ogbonna Chukwudi Justin, Izunobi Chinyeaka
Hostensia. Effect of correlated measurement errors on estimation of population mean with modified
ratio estimator. Biometrics and Biostatistics International Journal, Vol.11(2), 52–56.
- Izunobi Chinyeaka Hostensia, Onyeka Aloysius Chijioke, Iwueze Iheanyi Sylvester and Ogbonna
Chukwudi Justin (2021) Estimation of Population Mean in Poststratified Sampling Scheme in the
Presence of Measurement Errors. Journal of Research in Applied Mathematics. Volume 7(9), 49–55.
- Izunobi Chinyeaka Hostensia, Onyeka Aloysius Chijioke, Iwueze Iheanyi Sylvester and Ogbonna
Chukwudi Justin (2021) Estimation of Population Mean in Poststratified Sampling Scheme in the
Presence of Noneresponse. Journal of Research in Applied Mathematics. Volume 7(9), 56–64.
5
- Ikenna Caesar Nwandu, Aloysius C. Onyeka, Juliet N. Odii, Francisca O. Nwokoma and Theodora
- Onwuama (2021). Development of a smart detective device for maintenance of social distancing.
International Journal of Trend in Research and Development, Vol.7(5), 2394–9333.
- Nwaigwe, C.C., Onyeka, A.C. and Nwanneako, S.N. (2020). Comparison of Logit and Probit Models
in the Analysis of Severity of Diabetes. EC Diabetes and Metabolic Research Vol.4(6), 1–11.
- Onyeka, A.C., Erumaka, E.N., Nwokorie, E.C., Ayogu, I.I., Diala, S.O., Onyema, C.J. and Okpara,
A.I. (2020). Development of a Multi-level Service-oriented Academic Records Management and Re-
tention Software for Nigerian Universities. Accepted Concept Note for 2020 TetFund NRF Research
Grant, Abuja, Nigeria
- Izunobi, C.H and Onyeka, A.C (2019) Logarithmic ratio and product-type estimators of population
mean in simple random sampling. International Journal of Advanced Statistics and Probability,
Vol.7 (2), 47–55.
- Izunobi, C.H and Onyeka, A.C (2019) Estimation of population ratio in simple random sampling us-
ing variable transformation in the presence of nonresponse. Far East Journal of Theoretical Statistics,
Vol.57 (2), 103–114. http://dx.doi.org/10.17654/TS057020103.
- Onyeka, A.C, Ogbumuo, D.T, and Izunobi, C.H (2019) Estimation of Population Mean in Stratified
Random Sampling When Using Auxiliary Information in the Presence of Non-Response. Far East
Journal of Theoretical Statistics, Vol.55 (2), 151-167. http://dx.doi.org/10.17654/TS055020151.
- Nlebedim, V.U. and Onyeka, A.C. (2018). A Crash Course on LaTeX and R Software. Paper pre-
sented at Workshop on Computational Skills and Professional Writing held at Owerri Cbt Hitech,
Owerri, Imo State, Nigeria, May 28-30, 2018.
- Onyeka, A.C. (2018) Statistical Techniques for Analysis of Researches in Medical and Health Sci-
ences (Risks and Survival Analysis). Paper presented at the 11th Annual General Meeting (AGM)
and Conference of Nigerian College of Optometrists held at Top View Hotel, Asaba, Delta State,
Nigeria, April 26-28, 2018.
- Onyeka, A.C., Izunobi, C.H. and Iwueze, I.S. (2015) Estimation of Population Ratio in Post-Stratified
Sampling Using Variable Transformation. Open Journal of Statistics, 5, 1-9.
http://dx.doi.org/10.4236/ojs.2015.51001.
- Onyeka, A.C., Izunobi, C.H. and Iwueze, I.S. (2015) Separate-Type Estimators for Estimating Pop-
ulation Ratio in Post-Stratified Sampling Using Variable Transformation. Open Journal of Statistics,
5, 27-34. http://dx.doi.org/10.4236/ojs.2015.51004.
- Onyeka, A., Nlebedim, V. and Izunobi, C. (2014) A Class of Estimators for Population Ratio in
Simple Random Sampling Using Variable Transformation. Open Journal of Statistics, 4, 284-291.
http://www.scirp.org/journal/PaperInformation.aspxPaperID=47086#.U6tdprGZFw