Isaac Didi Essi1*, Joy C. Nwabueze2 and Zuonaki Ongodiebi3
1Statistics and Econometrics Modelling Group, P. O. Box 11518 (Main GPO), Near Rivers State Judiciary, Port Harcourt, Nigeria.
2Department of Statistics, Abia State University, Uturu, Abia State, Nigeria.
3Department of Mathematics/Statistics, Faculty of Science, University of Uyo, P. M. B. 1017, Uyo,
AkwaIbom State, Nigeria.
Email: [email protected]