1. Research Institute of Educational Science, Hunan University, Changsha, China
2. Department of Statistics, University of Azad Jammu and Kashmir, Muzaffarabad, Pakistan
3. Department of Mathematics, Women University of Azad Jammu and Kashmir, Bagh, Pakistan
4. School of Management, Nanjing University of Posts and Telecommunications, Nanjing, China
5. Statistics Program, Department of Mathematics, Statistics, and Physics, College of Arts and Science, Qatar University, Doha 2713, Qatar
6. Statistical Consulting Unit, College of Arts and Science, Qatar University, Doha 2713, Qatar