Stratified sampling (Edexcel GCSE Statistics): Flashcards

A distinct group within a population based on characteristics.

To ensure all important groups are properly represented.

Use (class size / total size) x desired sample size.

Ensures representation of all groups, not accidental misses.

Guarantees all key groups are fairly sampled.

Sample maintains the same group proportions as the population.

Dividing a population by age, gender, or class.