stratified sampling


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

stratified sampling

[′strad·ə‚fīd ′sam·pliŋ]
(statistics)
A random sample of specified size is drawn from each stratum of a population.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
A Family of Estimators for Estimating Population Mean in Stratified Sampling under Non Response.
The extrapolation results of the stratified sampling show that the precision of the Neyman optimal allocation method is higher than that of the proportional allocation method.
Brown (1989) also compared simple versus stratified sampling methods and recommended a stratified logarithmic method for choosing accessions from the collection.
A stratified sampling strategy was employed to ensure racial and socioeconomic diversity among the participants, who ranged in age from 18 to 65 years.
The formulary agreement process is virtually identical to the stratified sampling process Indiana auditors use to determine audit assessments.
If, however, the contamination site is known, or the purpose of the sampling is to determine the degree of decontamination achieved by a cleaning and disinfection, either judgmental sampling methods (clean versus soiled) or stratified sampling methods (timed sequence or measuring the degree of cleanliness) may be considered, with appropriate controls.
The trend table was established from a combination of pedological judgement and data from a structured stratified sampling program designed to `capture' the variation in soil properties as driven by elevation, aspect, and land system.
It has to rely on stratified sampling, buying the biggest and then a selection of the rest.
A stratified sampling scheme was developed in 1996 to monitor the population of this endemic snail.
Using a size of operation and geographic stratified sampling plan, Doane surveyed more than 800 producers quarterly about their use of anthelmintic, pharmaceutical, vaccine and feed medication/additive products.