Precision

How closely repeated measurements agree with one another.

Accuracy means closeness to the true value; precision means agreement between repeated measurements. Fine scale divisions or a detailed digital display help distinguish small changes, but do not guarantee accuracy. An instrument that is incorrectly zeroed can give consistently wrong readings.

How close repeated measurements are to one another.

Do not use accuracy and precision interchangeably. Repeating measurements does not, by itself, make them more accurate.

Close agreement shows precision and repeatability, not necessarily accuracy: the same error could affect every titration.

How closely repeated measurements agree with one another; a small spread indicates high precision.

The closeness of agreement between different measurement results.

Precision concerns how closely repeated titres agree. Repeatability means the same person can obtain similar results with the same method and equipment. Concordant titres support both, and further agreeing results give greater confidence that the agreement is not accidental.

The closeness of agreement between repeated measurements; precise measurements have little spread.

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OCR GCSE Combined Science A · J250

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OCR GCSE Combined Science B · J260