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Strata - GCSE Maths Definition

Reviewed by: Dan Finlay

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In GCSE Mathematics, the word stratum essentially means group. The plural of stratum is strata. A stratum is a group that is defined by having a particular characteristic or property, which is not necessarily mathematical. Strata are used when collecting data, so that the data is collected in such a way that a certain amount of items/people/etc are chosen from each stratum. Strata could be different colours, different genders, different race. Strata are used when collecting data to help ensure a sample is representative of the population.

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Dan Finlay

Reviewer: Dan Finlay

Expertise: Maths Subject Lead

Dan graduated from the University of Oxford with a First class degree in mathematics. As well as teaching maths for over 8 years, Dan has marked a range of exams for Edexcel, tutored students and taught A Level Accounting. Dan has a keen interest in statistics and probability and their real-life applications.

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