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GCSE Geography · key term
Selecting a sample by chance so that each member of the defined population has an equal chance of selection.
Used by AQA and OCR
Paper 3
Selecting samples by chance so that each eligible person or location has an equal chance of selection.
Revise: Fieldwork Planning and Data CollectionFor random sampling of an area, you can number eligible grid squares and use a random number generator to select them. Choosing whichever sites look easiest is not random sampling.
Specification 9.3 · Paper 1, Paper 2, Paper 3
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Random sampling selects observations by chance. For example, number all the eligible survey locations and randomly select some of those numbers. This reduces deliberate selection bias, although a small random sample can still miss important variations.
Selecting sample members by chance so that each member of the defined population has an equal chance of selection.