WILCOXON ESTIMATOR BASED ON STRATIFIED RANDOM SAMPLE

Improved Exponential Estimator in Stratified Random Sampling

In this article we have considered the problem of estimating the population mean   Y in the stratified random sampling using the information of an auxiliary variable x which is correlated with y and suggested improved exponential ratio estimators in the stratified random sampling. The mean square error (MSE) equations for the proposed estimators have been derived and it is shown that the prop...

Optimization of Random Sample Size in Progressively Type II Censoring based on Cost Criterion

So far censored samples have been studied by many researchers. One of the most important methods of censoring is progressively type II censoring. An interesting issue in the discussion of censoring is determination of the optimal sample size. Various factors are influential in determining the appropriate sample size, the most important of which is the sampling cost criterion. In this paper, ass...

Sample Allocation for Stratified Telephone Sample Designs

Stratified random walks on the n-cube

In this paper we present a method for analyzing a general class of random Ž . walks on the n-cube and certain subgraphs of it . These walks all have the property that the transition probabilities depend only on the level of the point at which the walk is. For these walks, we derive sharp bounds on their mixing rates, i.e., the number of steps required to Ž . guarantee that the resulting distrib...

An improved ranked set two-sample Mann-Whitney-Wilcoxon test

The authors present an improved ranked set two-sample Mann-Whitney-Wilcoxon test for a location shift between samples from two distributions F and G. They define a function that measures the amount of information provided by each observation from the two samples, given the actual joint ranking of all the units in a set. This information function is used as a guide for improving the Pitman effic...