4. Final expression of result
The expanded uncertainty is the product of the compound standard uncertainty and the expansion factor k = 2 :
.
Reminder of rounding rules to follow :
we consider at most two significant figures for uncertainty (by convention) ;
we increase the uncertainty and round off the measurand value (by convention);
the device resolution is taken into account.
The results of the expanded uncertainty calculations are shown in Table
13
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Final expression of result