1. Khaoula Aidi:
Laboratory of probability and statistics LaPS, University Badji Mokhtar, Annaba, Algeria
2. Nadeem S. Butt:
Department of Family and Community Medicine, Faculty of Medicine Rabigh, King Abdulaziz University, Jeddah, Kingdom of, Saudi Arabia
3. M. Masoom Ali:
Department of Mathematical Sciences, Ball State University, Muncie, Indiana 47306, USA
4. Mohamed Ibrahim:
Department of Applied, Mathematical and Actuarial Statistics, Faculty of Commerce, Damietta University, Damietta, Egypt
5. Haitham M. Yousof:
Department of Statistics, Mathematics and Insurance, Benha University, Benha 13518, Egypt
6. Wahid A. M. Shehata:
Department of Mathematics, Statistics and Insurance, Faculty of Business, Ain Shams University, Egypt