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Investigating an unusual value using the original report

An unusual value is a reason to inspect the source, not a reason to delete the row automatically. It may reflect a real reported result, a different method or a transcription problem.

For research use only. Not for human or veterinary use.

Check the original certificate, qualifiers and units. If the value is valid, retain it unless a predeclared inclusion rule excludes it for a defensible reason. If corrected, preserve a record of what changed.

Reading checklist

Open the source report
Check units and transcription
Document any correction or exclusion

Reference: Measurement uncertainty.

Sources and further reading

NIST: measurement uncertainty for reference materials

External references explain terminology and methods. They do not certify Eon products or establish suitability for human or veterinary use.