@article{(Open Science Index):https://publications.waset.org/pdf/10001069,
	  title     = {Estimating the Population Mean by Using Stratified Double Extreme Ranked Set Sample},
	  author    = {Mahmoud I. Syam and  Kamarulzaman Ibrahim and  Amer I. Al-Omari},
	  country	= {},
	  institution	= {},
	  abstract     = {Stratified double extreme ranked set sampling
(SDERSS) method is introduced and considered for estimating the
population mean. The SDERSS is compared with the simple random
sampling (SRS), stratified ranked set sampling (SRSS) and stratified
simple set sampling (SSRS). It is shown that the SDERSS estimator
is an unbiased of the population mean and more efficient than the
estimators using SRS, SRSS and SSRS when the underlying
distribution of the variable of interest is symmetric or asymmetric.
	    journal   = {International Journal of Mathematical and Computational Sciences},
	  volume    = {9},
	  number    = {4},
	  year      = {2015},
	  pages     = {228 - 234},
	  ee        = {https://publications.waset.org/pdf/10001069},
	  url   	= {https://publications.waset.org/vol/100},
	  bibsource = {https://publications.waset.org/},
	  issn  	= {eISSN: 1307-6892},
	  publisher = {World Academy of Science, Engineering and Technology},
	  index 	= {Open Science Index 100, 2015},