MODIFICATION OF SEPARATE RATIO TYPE EXPONENTIAL ESTIMATOR: A POST-STRATIFICATION APPROACH. FUDMA JOURNAL OF SCIENCES, [S. l.], v. 5, n. 2, p. 404–412, 2021. DOI: 10.33003/fjs-2021-0502-629. Disponível em: http://www.fjsadmin.fudutsinma.edu.ng/index.php/fjs/article/view/629. Acesso em: 11 sep. 2025.