stratum
1
7.4
- noun
- /ˈstreɪtəm/
- Specialized
:
estrato
- The response rate in the wealthiest SCF stratum is about 12 percent, increasing to 25 percent in the second-wealthiest stratum, 30 percent in the third-wealthiest, 40 percent in the fourth- and fifth-wealthiest, and then about 50 percent in the two least wealthy.
- sampled in each stratum
Examples
-
The important question is whether the families that eventually participate in the survey, thus representing their respective wealth stratum, are statistically distinguishable.
Academic text (2016) -
From a list of blocks in each stratum, a sample proportional to the size of the strata was randomly drawn.
Academic text (1993) -
Results for each stratum were then combined using meta-analysis.
Academic text (2012) -
Within each stratum, schools were drawn with probability proportional to size.
Academic text (2003) -
The administrative data underlying the SCF sampling are consistent with participants being representative of nonparticipants within each high-end stratum.
Academic text (2016) -
Interestingly, the distribution of respondents closely mirrored the percentages of participants within each stratum of the proportional stratified sample.
Academic text (2009) -
In our analyses, the increased odds of dying among people aged 65 to 74 years relative to the oldest age stratum disappeared when we used a comparison period of 2001 through 2008 but were apparent when the period was limited to 2005 through 2008.
Academic text (2012) -
We will select participants from each stratum to ensure diverse representation in our study.
-
The survey results were analyzed separately for each stratum to identify trends within different demographic groups.
-
To improve accuracy, researchers must ensure that each stratum is adequately represented in the sampling process.
Synonyms
3
6.4
A group within a larger population that share similar traits
1
3.9
A smaller group inside a larger group that shares certain features
Compounds
- Specialized
A thin, clear layer of skin in the palms and soles between outer and inner layers
- Specialized
A layer of elastic fibers in tissues like skin or blood vessels that helps them stretch and return to shape
- Specialized
A thin layer of skin under the outer layer made of dying cells with visible granules
How Large
- Specialized
27
3.5
- Specialized
1
7.4
- Specialized
47
3.6
∞
2.3
∞
2.3
Surface Forms
Etymology
Stratum comes from Latin stratum, from sternere 'to spread'. In statistics a 'stratum' is one subgroup or layer of a population, so researchers sample each layer to get a fair picture.