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We need to know the accuracy of such a measurement
Everybody feels to have an idea of what accuracy means. We can express
this “feeling” by the expression:
( )
( )
measured
true
D
D
≈
A better formulation could be this expression:
Note: This is not a mathematical equation!
w
w
( )
( )
true
measured
uncertainty interval
w
w
D
D
=
±
5.2
7