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IANZ Accredited Laboratory No 982

Estimated Uncertainty

The quantity defining an interval about the measurement m, that may be expected to encompass a large percentage of the distribution of values (typically 95% or greater) that could reasonably be attributed to the measured value. In the formula below, ks represents the expanded uncertainty.

value = m ± ks

value = value of the measurement
m = measurement (or mean of measurements)
k = coverage factor
s = standard uncertainty

(Estimated Uncertainty = Expanded Uncertainty)