Business A-Level
stratified sampling
What stratified sampling means in Business A-Level, as defined for AQA.
Definition of stratified sampling
Check what you remember
Read the wording for your board, then hide it and explain stratified sampling in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
Divides the population into subgroups (strata) and samples randomly from each, ensuring key groups are represented.
Topics that use stratified sampling
- Understanding markets and customers (AQA A-Level)
Related terms
- branding and price sensitivity
- confidence intervals
- cost and timeliness
- evidence based decisions
- income elasticity
- limits of estimated data
- limits of historic records
- market share arithmetic
Using stratified sampling in the exam
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