stratified sampling
- noun
- /ˈstrætɪfaɪd ˈsæmplɪŋ/
- Specialized
:
muestreo estratificado
- Thus, stratified sampling was used to select the comparison group, ensuring that the two special education groups had equal proportions of students with emotional, physical, learning, cognitive, and communication disabilities.
- the use of stratified sampling
- proportional stratified sampling
- stratified sampling procedure
Examples
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A stratified sampling method was used to ensure each age group was represented in the research study.
-
A stratified sampling approach was employed to ensure proportional representation of households in each village committee.
Academic text (2003) -
Due to the large population of the study, a proportional stratified sampling method was used.
Academic text (2011) -
We carried out a proportional stratified sampling based on the area codes in Israel.
Academic text (2002) -
The study sample was selected via the proportional stratified sampling method.
Academic text (2011) -
Finally, stratified sampling based on adolescent age, race, and geographic location was completed.
Academic text (2007) -
A stratified sampling procedure was used to obtain approximately the same number of participants for each of the four contamination levels.
Academic text (2000) -
A within-classroom stratified sampling plan was used to produce classroom and school findings representative of the actual range of student academic ability and grade level.
Academic text (2002) -
The NHANES uses a stratified sampling methodology that makes it possible to derive national estimates from survey participants' data.
Academic text (2012) -
From that group, stratified sampling was used to identify 235 institutions from the six AAHPERD districts that were selected as the sample for this study.
Academic text (1992)
Synonyms
1
5.9
A method of dividing people into groups and randomly choosing from each group so the sample matches the whole group
A sample made by dividing people into groups like age or income and choosing at random from each group
How Representative
- Specialized
1
5.9
- Specialized
- Specialized
20
3.9
- Specialized
1
4.0
- Specialized
1
6.8
Surface Forms
Morphology
The noun phrase is transparently compositional: it denotes a type of sampling that is done on a population that has been stratified (divided into strata), so the overall meaning is directly derivable from 'stratify' + 'sampling'. This follows regular English noun-modifier patterns and has clear cross-linguistic equivalents (e.g., Spanish 'muestreo estratificado'), so a B1 learner who already knows the constituent words should be able to infer the meaning.
Etymology
The term stratified sampling comes from the idea of dividing a whole group into 'layers' or 'groups', where stratified means 'layered' and sampling means taking a small part to study. One simple image is a layered cake: taking a slice from every layer tells you about the whole cake, so stratified sampling means taking random samples from each group to make sure all parts are represented.