1. Department of Statistics, The University of Dodoma, Dodoma, Tanzania
2. Department of Statistics, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
3. College of Statistical and Actuarial Sciences, University of the Punjab, Lahore, Pakistan
4. Department of Statistics, Bahauddin Zakaryia University, Multan, Pakistan
5. Department of Industrial and Management Engineering, POSTECH, Pohang, Republic of Korea