Dose Course Book

2176-2177 / 2239

If one wishes to report a result and its uncertainty with a higher
probability than 67%, one can say:
5.2The coverage factor and expanded uncertainty
with 97%
or: with 99%
c
2 y U u = ξ + = ξ + ⋅
3 y U u = ξ + = ξ + ⋅
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 .
c
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