1. Department of Statistics, Faculty of Physical Sciences, Nnamdi Azikiwe University, Awka P.O. Box 5025, Anambra, Nigeria
2. Department of Insurance and Risk Management, Faculty of Business Administration, University of Uyo, Akwa P.O. Box 520003, Ibom, Nigeria
3. Department of Quantitative Analysis, College of Business Administration, King Saud University, Riyadh 11587, Saudi Arabia
4. Department of Mathematics and Statistics, Faculty of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 11432, Saudi Arabia
5. Department of Statistics, Faculty of Business Administration, Delta University for Science and Technology, Gamasa 11152, Egypt
6. Department of Mathematics, Faculty of Science, Mansoura University, Mansoura 35516, Egypt