<s>
In	O
statistics	O
,	O
inverse-variance	B-General_Concept
weighting	I-General_Concept
is	O
a	O
method	O
of	O
aggregating	O
two	O
or	O
more	O
random	O
variables	O
to	O
minimize	O
the	O
variance	O
of	O
the	O
weighted	O
average	O
.	O
</s>
<s>
proportional	O
to	O
its	O
precision	B-General_Concept
.	O
</s>
<s>
Inverse-variance	B-General_Concept
weighting	I-General_Concept
is	O
typically	O
used	O
in	O
statistical	O
meta-analysis	O
or	O
sensor	B-General_Concept
fusion	I-General_Concept
to	O
combine	O
the	O
results	O
from	O
independent	O
measurements	O
.	O
</s>
<s>
For	O
multivariate	O
distributions	O
the	O
term	O
"	O
precision-weighted	O
"	O
average	O
is	O
more	O
commonly	O
used	O
.	O
</s>
