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Additional
Relative standard deviation
English Wikipedia - The Free Encyclopedia
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Coefficient of variation
In
probability theory
and
statistics
, the
coefficient of variation
(
CV
), also known as
relative standard deviation
(
RSD
), is a
standardized
measure of
dispersion
of a
probability distribution
or
frequency distribution
. It is often expressed as a percentage, and is defined as the ratio of the
standard deviation
to the
mean
(or its
absolute value
, ). The CV or RSD is widely used in
analytical chemistry
to express the precision and repeatability of an
assay
. It is also commonly used in fields such as
engineering
or
physics
when doing quality assurance studies and
ANOVA gauge R&R
.
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