1. Department of Statistics and Quantitative Methods, Faculty of Business Administration, Horus University, Damietta, Egypt
2. Departamento de Estatistica, Universidade Federal de Pernambuco, Recife, Brazil
3. Department of Statistics and Actuarial Science, School of Physical and Mathematical Sciences, College of Basic and Applied Sciences, University of Ghana, Accra, Ghana
4. Department of Statistics, Mathematics and Insurance, Benha University, Benha, Egypt
5. Department of Applied, Mathematical and Actuarial Statistics, Faculty of Commerce, Damietta University, Damietta, Egypt