Stratification
From Open Risk Manual
Revision as of 15:30, 10 June 2021 by Wiki admin (talk | contribs)
Definition
Stratification is the sorting of data attributes concerning any group of entities (people, objects etc) into distinct homogeneous sub-groups and (optionally) the representation of subgroup information in aggregate form or the sampling of individuals from subgroups.
The need for stratification arizes from the accumulation of large amounts of granular datasets which poses cognitive problems in the understanding and communication of the information content of such data sets.
Usage
- Stratification can be used to check or ensure a target Allocation of subgroups
- Stratification can be used to control for confounding variables (variables other than those the researcher is studying), thereby making it easier for the research to detect and interpret relationships between variables
Issues and Challenges
- Stratification is related but distinct from descriptive statistics, that is summary statistics that quantitatively describe or summarize features from a collection of information.
