CAIE A-Level Physics 1.3.2 Precision and Accuracy

Practise judging precision from repeatability and accuracy from closeness to an accepted value, classifying datasets and evaluating measurement methods.

Exam points

Compare precision as spread/repeatability with accuracy as closeness to a true or accepted value.
Classify measurements or datasets as precise, accurate, both or neither from their spread and central value.
Use the precision/accuracy distinction to evaluate a measurement method or experimental conclusion.

[Maximum number: 2]

(a)

A set of experimental measurements is described as precise and not accurate.

State what is meant by:

[ 2 ]

(i)

precise

[ 1 ]

(ii)

not accurate.

[ 1 ]

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1.3.2—The distinction between precision and accuracy question 1

Question (a)

Question (i)

Question (ii)