Variance is a measurement of the spread between numbers in a data set. Investors use the variance equation to evaluate a portfolio’s asset allocation.

Flickr via Google Images Standard deviation is a concept that's thrown around frequently in finance. So what is it? When working with a quantitative data set, one of the first things we want to know ...

An animated guide explaining how the standard devition can give you a clearer picture of a sample than averages alone. An example involving zoo keepers and some very dangerous animals demonstrates ...