1. Haitham M. Yousof:
Department of Statistics, Mathematics and Insurance, Benha University, Egypt.
2. Nadeem Shafique Butt:
Department of Family and Community Medicine King Abdul Aziz University, Jeddah, Kingdom of Saudi Arabia.
3. Refah Mohammed Alotaibi:
Mathematical Sciences Department, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia.
4. Rezk H:
Mathematical Sciences Department, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia and Department of Statistics, Al-Azhar University, Cairo, Egypt.
5. Ghadah A. Alomani:
Mathematical Sciences Department, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia.
6. Mohamed Ibrahim:
Department of Applied Statistics and Insurance, Faculty of Commerce, Damietta University, Egypt