Question:
An analyst reported 40.9 ppm Na in all 10 analyses of the standard solution having a true value of 40.11 ± 0.3 ppm. This data is:
An analyst reported 40.9 ppm Na in all 10 analyses of the standard solution having a true value of 40.11 ± 0.3 ppm. This data is:
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Precision refers to the consistency of results, while accuracy indicates how close results are to the true value.
Updated On: Feb 20, 2026
- Precise but not accurate
- Accurate but not precise
- Neither accurate nor precise
- Both accurate and precise
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The Correct Option is D
Solution and Explanation
Precision: The analyst consistently reported 40.9 ppm for all 10 analyses, showing low variation and high precision.
Accuracy: The reported value (40.9 ppm) falls within the range of the true value (40.11 ± 0.3 ppm), indicating accuracy.
Therefore, the data is both accurate (close to the true value) and precise (reproducible).
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