Eleazar C. Nwogu

Modified Preston-Bennett Method for Estimation of Adult Mortality in Developing Countries

Eleazar C. Nwogu, Felix N. Nwobi & Chinonso O. Okoro · Archives of Current Research International · 2021

This study proposes a modified Preston-Bennett method for the estimation of adult mortality in developing countries. Unlike the previous method, the proposed method derives estimates of adult mortality directly from the 5-year age distribution at the mid-point of the inter-censal...

Open access Research Article 10.9734/acri/2021/v21i530244

On the Effects of Missing Values on Estimates of Trend Parameters and Seasonal Indices in Descriptive Time Series Analysis

Lawrence C. Kiwu, Eleazar C. Nwogu, Chukwudi J. Ogbonna, Hycinth C. Iwu & Iheanyi S. Iwueze · Archives of Current Research International · 2025

In literature, when missing values are observed in a series, emphasis has always been on obtaining the estimates of the missing values while little or no attention has been given to assessing the effects of the missing values on parameter estimates. The aim of this study therefor...

Open access Research Article 10.9734/acri/2025/v25i41142

Effect of Missing Observations on Buys-Ballot Estimates of Time Series Components

Kelechukwu C. N. Dozie, Eleazar C. Nwogu & Maxwell A. Ijomah · Asian Journal of Probability and Statistics · 2020

This study discusses the effects of missing observations on Buys-Ballot estimate when trend-cycle component of time series is linear. The method adopted in this study is Decomposing Without the Missing Value (DWMV) which is used to estimate missing observations in time series dec...

Open access Research Article 10.9734/ajpas/2020/v6i330161