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Sampling bias — OCR GCSE Combined Science B Definition

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Combined Science
Key terms
Sampling bias

GCSE Combined Science · key term

Sampling bias

Definition

A systematic tendency in a sampling method to favour particular parts of a population, making the sample unrepresentative.

Used by OCR

How each exam board covers it

OCR GCSE Combined Science B · J260

Specification M2 · Biology, Chemistry, Physics, Combined Science

Choosing only bare patches would underestimate it. This systematic favouring of particular locations is sampling bias.
Revise: Sampling and Simple Probability

OCR Combined Science B past papers

Related key terms

Expected frequency
Population
Probability
Quadrat
Random sampling

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Relative frequency

Representative sample