1. Department of Mathematics and Statistics, Pan African University Institute for Basic Sciences, Technology, and Innovation (PAUSTI), Nairobi, Kenya; Ecole Nationale de Statistique, de Planification et de Demographie (ENSPD), Universite de Parakou, Parakou, Benin
2. Ecole Nationale de Statistique, de Planification et de Demographie (ENSPD), Universite de Parakou, Parakou, Benin
3. School of Mathematics, University of Nairobi, Nairobi, Kenya; Faculte des Sciences de l’Education, Universite de Montreal, Montreal, Canada
4. Department of Education, Consortium Siabanni Pour la Formation, la Recherche et le Developpement (Consortium SFR-D), Abomey-Calavi, Benin; Institute of Tropical and Infectious Diseases, University of Nairobi, Nairobi, Kenya; Strathmore University Business School, Strathmore University, Nairobi, Kenya; Department of Health Research, Holo Global Health Research Institute, Nairobi, Kenya; Department of Health Research, Health Data Acumen, Nairobi, Kenya; College of Health Sciences, MOI University, Nairobi, Kenya
5. Department of Mathematics and Statistics, Pan African University Institute for Basic Sciences, Technology, and Innovation (PAUSTI), Nairobi, Kenya