stratified sampling


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Related to stratified sampling: random sampling, Systematic sampling, Cluster sampling
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Synonyms for stratified sampling

the population is divided into subpopulations (strata) and random samples are taken of each stratum

References in periodicals archive ?
To determine the number of weevils per spikelet on the male inflorescence during the anthesis period, samples were taken at 11:00, and 6 complete spikelets were subjected to stratified sampling each from 6 sections of the male inflorescence.
where and x are Hansen-Hurwitz estimators modified to the stratified sampling for population means X and Y respectively, and ( yh(1) , xh(1) ), and ( yh( 2) r , xh( 2) r ) are the sample means for hth stratum based on nh(1) and nh(2)r units respectively, and xs t L Ph xh is the sample mean based It is to be pointed out that YRd is modified form of Tabasum and Khan [6] to the stratified sampling.
The Grid: An overview of the four styles of Quantitative Research Content Descriptive Correlational Sample Simple random, Random Stratified Sampling, Proportionate Stratified Sampling and Cluster Sampling Example Can use both Survey method may be of types of quantitative and used to determine instruments/ qualitative methods.
Sample-based methodologies can be classified as random sampling, stratified sampling, and systematic sampling.
The survey field work operations will continue for about a month, targeting a sample selected according to the stratified sampling methodology.
The authors selected control schools using stratified sampling to match the RAMP schools on the two strata of level and locale.
At a special session chaired by Weidlinger Senior Associate Adam Hapij, Weidlinger engineers introduced an adaptive stratified sampling methodology that, compared to traditional Monte Carlo methods, permits researchers to minimize the number of calculations necessary to quantify the uncertainty associated with shock testing using either conventional underwater explosions or air-gun loading.
A stratified sampling plan should be used to evaluate within location variation vs.
Revenue Procedure 2011-42 describes simple random and stratified sampling and lists four estimation procedures as appropriate, albeit with limitations on the use of two of them.
Part 2 covers how to use survey data and part 3 presents some useful sample designs, such as stratified sampling, cluster and systematic sampling, multistage designs, and double or two-phase sampling.
About one-third of the parishes surveyed were based on random sampling, but nearly two-thirds of the responses came from parishes contacted by what sociologists refer to as "stratified sampling" to ensure that Catholic demographics across the country were more accurately represented.
For sites currently using statistical sampling inventory methods instead of an annual wall-to-wall inventory, sampling inventories will be performed using Navy ERP's "stratified sampling" statistical method.
OAA may be defined as a procedure used in stratified sampling to allocate numbers of sample units to different strata either to maximize precision at a fixed cost or to minimize cost for a selected level of precision; precision in this sense means both closeness to a true value and repeatability over time.
The objective of this paper is to investigate the comparative sensitivity of detecting a process shift in a multi-strata production process under random and stratified sampling methods.