1. Department of Statistics, Faculty of Business Administration, Delta University for Science and Technology, Gamasa 11152, Egypt
2. Department of Mathematical Statistical, Faculty of Graduate Studies for Statistical Research, Cairo University, Cairo 12613, Egypt
3. Department of Mathematical Sciences, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
4. Department of Statistics, Al-Azhar University, Cairo 11751, Egypt