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The values of input quantities are – of course – also subjected to

probability distribution.

Therefore, an

estimate

of the measurand

Y

, denoted by

y

, is obtained

5.2

using

input estimates

x

1

,

x

2

, ...,

x

N

for the values of the

N

input

quantities

X

1

,

X

2

, ...,

X

N

.

Thus the

output estimate

y

, which is the result of the measurement, is

given by:

73

1 2

N

y f ( x , x ,.....x )

=

estimates