GUM

An acronym commonly used to identify the ISO Guide to the Expression of Uncertainty in Measurement.

Coverage factor

A numerical factor used as a multiplier of the combined standard uncertainty in order to obtain an expanded uncertainty.

Confidence interval

A range of values that is expected to contain the true value of the parameter being evaluated with a specified level of confidence.

Combined standard uncertainty

The standard uncertainty of the result of a measurement, when that result is obtained from the values of a number of other quantities.

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