1. Department of Statistics, Mathematics and Insurance, Benha University, Benha, Egypt
2. Department of Statistics, Faculty of Science, King Abdulaziz University, Jeddah, Kingdom of Saudia Arabia
3. Department of Statistics, Faculty of Commerce, Zagazig University, Zagazig, Egypt
4. Departamento de Estatística, Universidade Federal de Pernambuco, Recife, Brazil
5. Department of Statistics, Central University of Haryana, Mahendergarh, India