Exam-style question
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Which statement best describes repeatability in measurements?.
- A.Repeatability is the ability to obtain the same result under unchanged conditions
- B.Repeatability is the closeness of a measurement to the true value
- C.Repeatability is the smallest increment that can be measured
- D.Repeatability is the degree of variation in a set of measurements
Model answer
What a good answer should say
- Repeatability is the ability to obtain the same result under unchanged conditions
Explanation
Why this works
Repeatability is defined as the ability to obtain the same result when measurements are repeated under the same conditions. The key difference is that repeatability emphasizes consistency over time, while accuracy focuses on how close a measurement is to the true value.
Repeatability applies when measurements are taken multiple times in the same environment, while accuracy applies when comparing to a known standard. Thus, the correct answer highlights the importance of consistent results in repeated measurements.
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