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Statistics
Key terms
Linear interpolation

GCSE Statistics · key term

Linear interpolation

Definition

A method of estimating a value between two known endpoints by assuming an even spread between them.

Used by Edexcel

How each exam board covers it

Edexcel GCSE Statistics · 1ST0

Specification 2b.01, 2c.01 · Paper 1, Paper 2

Linear interpolation assumes the observations are evenly spread across it.
Revise: Calculating averages for discrete and grouped data
Estimating a value between two known values by assuming a constant rate of change between them.
Revise: Calculating measures of spread

Edexcel Statistics past papers

Related key terms

Cumulative frequency
Median
Arithmetic mean
Class boundary
Class midpoint

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Linear interpolation — Edexcel GCSE Statistics Definition | GradeGen

Interdecile range