1. Institute of Strategic Industrial Decision Modeling, School of Quantitative Sciences, Universiti Utara Malaysia, Sintok, Malaysia
2. School of Distance Education, Universiti Sains Malaysia, Penang, Malaysia
3. Department of Statistics, School of Physical Sciences, Shahjalal University of Science and Technology, Sylhet, Bangladesh
4. Faculty of Economics, Administrative and Social Sciences, Istanbul Gelisim University, Istanbul, Turkey
5. School of Mathematical Sciences, Universiti Sains Malaysia, Penang, Malaysia