(statistics) a measure of the relative variation of distribution independent of the units of measurement; the standard deviation divided by the mean, sometimes expressed as a percentage
Contemporary definitions for coefficient of variation
noun
a statistical measure of investment risk in which risk is defined as the standard deviation per unit of expected return; the ratio of standard deviation to the mean
Examples
There is an equivalent definition for the coefficient of variation of a population, which is based on the expected value and the standard deviation of a random variable.