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)