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RECAP
5.2
(1) The term
measurand
denotes a well defined physical quantity to be
measured.
(2) The value of a measurand is a
stochastic quantity
subjected to a
probability distribution
.
(3) If this probability distribution is known, then the best estimate of the
measurand is the expectation value of the measurand.
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(4) The corresponding standard uncertainty is the positive square root of
the variance of the probability distribution.