The Discussion Of Stratified Ranked Set Sampling

Ranked set sampling is more effective than simple random sampling in many situation. So,the statistical inference based on this sampling method has been paid more and more attention from the nineties of the last century.There are many beautiful results on the hypothesis testing,parameter estimation and nonparametric statistics so far.On statistical inference,using the mean of the sample to estimate the mean of the population distribution is undoubtedly the very basis and importance.Amber has come up with stratified percentile ranked set sampling in2011,combined ranked-set sampling and stratified sampling, study the mean of the population distribution by studying the dynamic ranked-set sampling method under the condition of fixed in hierarchical way.In this paper, on the basis of this article,in a different direction,under the condition of fixed on ranked-set sampling way,to study the effect of hierarchical method on estimating the population mean under perfect ranking and unperfect ranking two sides,and the data simulation results are presented.