[1] Department of Statistics, Bahauddin Zakariya University, Multan, Pakistan
[2] Department of Statistics, Comsats University Islamabad, Lahore Campus, Islamabad, Pakistan
[3] Department of Statistics, Faculty of Science, King Abdulaziz University, Jeddah,21551, Saudi Arabia
[4] Department of Statistics, Yazd University, P.O. Box 89175-741, Yazd, Iran