Modified Ratio-Type Estimators of the Mean using Extreme Ranked Set Sampling
Amer Ibrahim Al-Omari, Khalifa Jaber and Ahmad Al-Omari
DOI : 10.3844/jmssp.2008.150.155
Journal of Mathematics and Statistics
Volume 4, Issue 3
Modified ratio-type estimators of the population mean were suggested using the first or third quartiles of the auxiliary variable based on Simple Random Sampling (SRS) and Extreme Ranked Set Sampling (ERSS) methods. It was found that, the ERSS was more efficient than the SRS based on the same sample size. Also, the ERSS involving the first quartile was superior to the third quartile.
© 2008 Amer Ibrahim Al-Omari, Khalifa Jaber and Ahmad Al-Omari. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.