Osuji George A.

Department of Statistics, Nnamdi Azikiwe University, Awka Anambra State Nigeria

Opara Jude

Department of Statistics, Imo State University, Owerri Nigeria

Nwobi Anderson C.

Department of Statistics, Abia State Polytechnic, Aba Nigeria

Onyeze Vitus

Department of Statistics, Imo State University, Owerri Nigeria

Iheagwara Andrew I.

Department of Planning, Research and Statistics, Ministry of Petroleum and Environment Owerri Imo State Nigeria