Dose 2016

5.2 The coverage factor and expanded uncertainty

If one wishes to report a result and its uncertainty with a higher

probability than 67%, one can say:

with 97%

y

2 U u = ξ + = ξ + ⋅

c

y

3 U u = ξ + = ξ + ⋅

or:

with 99%

c

where the "2" or the "3" is called the " coverage factor " and the product

between coverage factor and standard uncertainty is termed the

expanded uncertainty U .

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