1. Department of Statistics, Quaid-I-Azam University, Islamabad, Pakistan
2. Department of Mathematics, College of Sciences and Arts (Muhyil), King Khalid University, Muhyil, Saudi Arabia
3. Department of Mathematics and Computer, College of Sciences, Ibb University, Ibb, Yemen
4. Mathematics Department, College of Humanities and Science, Prince Sattam Bin Abdulaziz University, Al Aflaj, Saudia Arabia
5. Administration Department, Administrative Science College, Thamar University, Thamar, Yemen
6. Knowledge unit of business Economics accountancy and Commerce(KUBEAC), University of Management and Technology, Sialkot, Pakistan
7. Department of Statistics, Abdul Wali Khan University Mardan, Khyber Pakhtunkhwa, Pakistan