stratified random sample
[strætɪfaɪd ˈrændəm ˈsæmpəl]
nounpl: stratified random samples
amostra aleatória estratificada
1. A sampling technique in which a population is divided into distinct subgroups (strata) based on shared characteristics, and random samples are drawn from each stratum
The research team used a stratified random sample to ensure representation from each income level in the survey.
A equipe de pesquisa utilizou uma amostra aleatória estratificada para garantir representação de cada nível de renda na pesquisa.
2. A method that improves statistical accuracy by reducing sampling variability within homogeneous groups
By employing stratified random sampling, we could reduce the margin of error significantly.
Ao empregar amostragem aleatória estratificada, conseguimos reduzir significativamente a margem de erro.
This is a technical term primarily used in academic, research, and statistical contexts in both Brazilian Portuguese and North American English. It is essential terminology in fields such as market research, epidemiology, and social sciences. The concept reflects the importance of ensuring diverse representation in research, which is particularly valued in multicultural societies like Brazil and the USA.
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