Julius C. Nwanya

Optimal Prediction Variance Capabilities of Inscribed Central Composite Designs

Julius C. Nwanya & Kelechukwu C. N. Dozie · Asian Journal of Probability and Statistics · 2020

This study looks at the effects of replication on prediction variance performances of inscribe central composite design especially those without replication on the factorial and axial portion (ICCD1), inscribe central composite design with replicated axial portion (ICCD2) and ins...

Open access Research Article 10.9734/ajpas/2020/v8i130194

Comparison of Mixed and Multiplicative Models when Trend Cycle Component is Linear

Kelechukwu C. N. Dozie & Julius C. Nwanya · Asian Journal of Advanced Research and Reports · 2020

The purpose of this study is to present the linear trend cycle component with the emphasis on the choice between mixed and multiplication models in time series analysis. Most of the existing studies have adequately dwelt more on choice of model between additive and multiplicative...

Open access Research Article 10.9734/ajarr/2020/v12i430295