Accuracy Vs Precision
Easychemistry
Repeated measurements close together but deviating from true value show:
Select the correct option:
Solution
Incorrect! Answer:
High precision and low accuracy
- Precision: Relates to the repeatability or consistency of the results. If multiple trials give values very close to each other (low standard deviation), the measurement set is highly precise.
- Accuracy: Relates to how close the average of the measurements is to the true or accepted value.
- Scenario: If a balance is calibrated incorrectly by +2g, every weighing will be consistent (precise) but will be incorrect relative to the truth (inaccurate).
- Conclusion: Clustered data far from the bullseye represents High Precision and Low Accuracy.
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About This Question
- Subject
- chemistry
- Chapter
- practical chemistry
- Topic
- accuracy vs precision
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
High precision and low accuracy
- Precision: Relates to the repeatability or consistency of the results. If multiple trials give values very close to each other (low standard deviation), the measurement set is highly precise.
- Accuracy: Relates to how close the average of the measurements is to the true or accepted value.
- Scenario: If a balance is calibrated incorrectly by +2g, every weighing will be consistent (precise) but will be incorrect relative to the truth (inaccurate).
- Conclusion: Clustered data far from the bullseye represents High Precision and Low Accuracy.
This easy difficulty chemistry question is from the chapter practical chemistry, covering the topic of accuracy vs precision. It appeared in the 2025 exam.
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