OSUJI GEORGE A.

Department of Statistics, Nnamdi Azikiwe University PMB 5025, Awka Anambra State Nigeria

OGBONNA CHUKWUDI J.

Department of Statistics, Federal University of Technology Owerri Nigeria PMB 1526, Owerri Nigeria

OPARA JUDE

Department of Statistics, Imo State University PMB 2000, Owerri Nigeria