1. Department of Mathematical Sciences College of Science Princess Nourah bint Abdulrahman University Riyadh Saudi Arabia
2. Department of Statistical Faculty of Business Administration Delta University for Science and Technology Gamasa Egypt
3. Department of Mathematical Statistical Faculty of Graduate Studies for Statistical Research Cairo University Cairo Egypt
4. Department of Management Science and Statistics The University of Texas at San Antonio San Antonio Texas USA
5. Department of Statistics Al‐Azhar University Cairo Egypt