GCSE · Sampling

Populations & samplesExam-style questions

What a population and a sample are and why we sample at all; why a representative sample matters more than a big one; and the two calculations that earn the marks — scaling a sample up to estimate a population total (including capture–recapture and its assumptions) and sharing a stratified sample out in proportion.

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11 questions · GCSE (Higher) level · mark scheme and worked solution on each · no sign-up to try

DifficultyAll Level 1 Level 2 Level 3 Level 4 Level 5

1
A head teacher wants to know how the $900$ students at her school travel to school. She asks $50$ of them. What name is given to (a) the $900$ students,
(b) the $50$ students?
Level 1 · 2 marksTry it
2
Give one reason why someone might take a sample instead of asking the whole population.
Level 1 · 1 markTry it