ZAHID KHAN; AMINA SHAHZADI; AMMARA NAWAZ CHEEMA; BASHIR UL HAQ; MARIA MALIK. An Efficient Modified Ratio Estimator under Stratified Ranked Set Sampling . Metallurgical and Materials Engineering, [S. l.], v. 30, n. 4, p. 677–686, 2024. DOI: 10.63278/1497. Disponível em: https://metall-mater-eng.com/index.php/home/article/view/1497. Acesso em: 6 may. 2026.