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Random variation — Edexcel GCSE Statistics Definition | GradeGen

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Statistics
Key terms
Random variation

GCSE Statistics · key term

Random variation

Definition

Differences in results that arise by chance between random trials or between random samples.

Used by Edexcel

How each exam board covers it

Edexcel GCSE Statistics · 1ST0

Specification 3p.06, 3p.10 · Paper 1, Paper 2

Revise: Experimental and theoretical probability trends
Differences in results arising through chance, even when the probabilities remain unchanged.
Revise: Bias in experimental and theoretical values

Edexcel Statistics past papers

Exam tips

1
A larger sample reduces random variation; it does not automatically correct an unrepresentative sample.

Related key terms

Experimental probability
Theoretical probability
Bias
Expected frequency
Observed frequency

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Population parameter