Use stream of consciousness to answer the following. 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 (\ displaystyle \ \ sigma) to the mean (\ displaystyle \ \ mu) (or its absolute value, ( \ displaystyle \ mu) ). 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. In addition, CV is utilized by economists and investors in economic models and in determining the volatility of a security.

What does the coefficient of variation tell us?
The relevant sentence in the passage is: 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. Final answer: a standardized measure of dispersion of a probability distribution or frequency distribution.