OCR GCSE Chemistry A · J248
Specification C2.1b · Paper 1 (Foundation), Paper 3 (Higher)
- Revise: Melting Point Analysis
Agreement between repeated measurements made using the same method.
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GCSE Chemistry · key term
The closeness of agreement between repeated results obtained by the same person using the same method and equipment.
Used by OCR
Specification C2.1b · Paper 1 (Foundation), Paper 3 (Higher)
Agreement between repeated measurements made using the same method.
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
The ability to obtain similar results when the same person repeats a method using the same equipment.
The closeness of agreement between results obtained when a measurement or investigation is repeated under the same conditions.
The closeness of results obtained when the same person repeats a measurement using the same method and equipment.
Evidence from an investigation that agrees closely when the same person repeats the measurement using the same method and equipment.
Avoid the vague word “reliable”. Identify the relevant quality explicitly: accuracy, precision, repeatability or reproducibility.
Distinguish repeatability from reproducibility: repeating with the same person and method tests repeatability; involving different people or equipment tests reproducibility.
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