Joseph Odunayo Braimah (Department of Mathematical Statistics and Actuarial Sciences, University of the Free State, Bloemfontein 9301, South Africa)
Ibrahim Sule (Department of Statistics, Confluence University of Science and Technology, Osara 264103, Nigeria)
Olalekan Akanji Bello (Department of Statistics, Ahmadu Bello University, Zaria 810241, Nigeria)
Fabio Mathias Correa (Department of Mathematical Statistics and Actuarial Sciences, University of the Free State, Bloemfontein 9301, South Africa)
Ting Sun (Department of Surgery, University of Utah Spencer Fox Eccles School of Medicine, 30 N Mario Cappechi Drive, Salt Lake City, UT 84132, United States)
Chuang Wang (Department of Educational Leadership, University of North Carolina at Charlotte Cato College of Education, Charlotte, NC 28223, United States)
Richard G. Lambert (Department of Educational Leadership, University of North Carolina at Charlotte Cato College of Education, Charlotte, NC 28223, United States)
Madona Yunita Wijaya (Study Program of Mathematics, Faculty of Science and Technology, Syarif Hidayatullah Jakarta Islamic State University, Banten 15412, Indonesia)
Nina Fitriyati (Study Program of Mathematics, Faculty of Science and Technology, Syarif Hidayatullah Jakarta Islamic State University, Banten 15412, Indonesia)
Najib Ridho Sandika (Study Program of Mathematics, Faculty of Science and Technology, Syarif Hidayatullah Jakarta Islamic State University, Banten 15412, Indonesia)
Subian Saidi (Department of Mathematics, Faculty of Mathematics and Natural Science, University of Lampung, Lampung 35141, Indonesia)
Netti Herawati (university of Lampung, Indonesia)
Khoirin Nisa (university of Lampung, Indonesia)