A number of techniques for probability sampling without replacement (SWOR) have been suggested, although it is not clear which method is consistently superior in terms of statistical efficiency. Rao and Bayless (1969) empirically studied the stability of estimators of the population total for a variety of methods of unequal probability SWOR when selecting two units per stratum. One of their maj...

tatistical inference allows one to draw conclusions about the characteristics of a population on the basis of data collected from a sample of subjects from that population. Almost all the statistical inferences typically seen in the medical literature are based on probability models that connect summary statistics calculated using the observed data to estimates of parameter values in the popula...

It is well known that quantum correlations for bipartite dichotomic measurements are those of the form γ = (〈ui, vj〉)i,j=1, where the vectors ui and vj are in the unit ball of a real Hilbert space. In this work we study the probability of the nonlocal nature of these correlations as a function of α = m n , where the previous vectors are sampled according to the Haar measure in the unit sphere o...

Abstract In this research work we introduce a new sampling design, namely two-stage cluster sampling, where probability proportional to size with replacement is used in the first stage unit and ranked set second order address issue of marked variability sizes population units concerned sampling. We obtained an unbiased estimator mean total, as well variance estimator. calculated relative effici...