Standard deviation is a measurement of market volatility. Learn how investors use standard deviation in the MoneySense Glossary. Standard deviation (σ) is an investing metric used to measure the ...

The empirical rule is also used as a rough way to test a distribution's "normality." If too many data points fall outside the three standard deviation boundaries, this suggests that the ...

However, the cause of this relationship has not been clarified. In geometry, SD has an intrinsic relationship with SS −1 or SL −2, which is defined as a geometric constraint here. We compiled global ...