Expanded uncertainty: U
We will write:
Interval
may
be expected to
encompass a large fraction of the distribution of
values that could reasonably be attributed to Y.
It should be called "confidence interval" only when
all components of uncertainty that contribute to
be
obtained from Type A evaluation.
We will write
k is the coverage factor
k depends on the level of confidence
(and on the PDF of the output measurand)