Reference library2 entries

Tag: NIST

Practical explanations, worked examples, and reference notes for reporting numbers correctly.

Measurement Uncertainty

What Measurement Uncertainty Actually Is (and Why It Matters)

Measurement uncertainty is a quantitative expression of the doubt associated with a measured value. This guide explains its definition, evaluation per GUM, reporting conventions,…

Read explanation

Measurement Uncertainty

How Many Sig Figs Should an Uncertainty Have? (Usually One or Two)

The uncertainty in a measurement should be reported with one or two significant figures, depending on the magnitude of the leading digit and the…

Read explanation