Etorti Imoke John, Effanga Effanga Okon, Mbe E Nja, Oglewu John Adoga.
A class of ratio-cum-product estimators of population mean under extreme ranked set sampling (ERSS) and simple random sampling (SRS). Int J Stat Appl Math 2022;7(2):133-148. DOI:
10.22271/maths.2022.v7.i2b.807