1. Department of Statistics, Quaid-i-Azam University, Islamabad, Pakistan
2. Faculty of Health Studies, University of Bradford, Bradford, UK
3. Administrative Sciences Department, Community College, King Saud University, Riyadh, Saudi Arabia
4. Applied Statistics Department, Faculty of Commerce, Mansoura University, Mansoura, Egypt
5. Arriyadh Community College, King Saud University, Riyadh, Saudi Arabia
6. KSA Workers University, Nsar, Egypt
7. College of Business Administration, King Saud University Muzahimiyah, Al-Muzahmiya, Saudi Arabia