OCR GCSE Chemistry B · J258
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
Revise: Sample size and rangeThe range of values runs from the lowest to the highest value investigated or measured.
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GCSE Chemistry · key term
One of the deliberately selected settings of the independent variable, such as a particular concentration or temperature.
Used by OCR
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
Revise: Sample size and rangeThe range of values runs from the lowest to the highest value investigated or measured.
When asked to suggest values, give actual numbers with units where the context provides enough information; do not write only “use a wide range”.
Justify the range by explaining why its lowest and highest values are safe, measurable and likely to reveal the relationship being tested.
Do not present a fixed rule such as “always use five values”. The appropriate number depends on the investigation.
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