The phrase 'stratification variable' is correct and usable in written English.
You can use this phrase when referring to a variable used to separate population groups into strata, or distinct subgroups, in a statistical analysis. For example, "The researchers used the age of the participants as a stratification variable in their analysis."
With a single stratification variable, the number of strata employed was two, three, four or six.
A stratified random sampling design was implemented using field size as the stratification variable.
Subgroup analyzes stratified on sex and age groups separately were also performed with the stratification variable excluded from the model.
The preferred option with the Nundle stands was for a single stratification variable rather than two variables but this was not the case for the Green Hills stands.
We assumed that the standard deviation of timber volume, S h, would be unknown for the purposes of survey design and used the standard deviation of the primary stratification variable instead.
The post-pandemic sample size was designed with a disproportionately greater representation of very young and very old persons and with broad coverage of all geographic areas of NSW by using postcode as a stratification variable.
The case-only design is statistically powerful for the investigation of interactions.[17], [18] The key assumption underpinning the design is independence in the population between the stratification variable and risk factor;[19] if violated, risk estimates may be biased.
In the formal urban areas, race was also used as a third stratification variable (based on the predominant race group in the selected EA at the time of the 2001 census).
The animal-level region-wide seroprevalence variance estimates (
All multivariate analyses also adjust for this stratification variable.
Group was included as the conditional (experimental group) stratification variable.
