Everybody understands field goal percentage and three-point percentage. We all know what making 40% of three-point attempts ...

Ask someone to tell you how long their commute is, and they can probably provide an average number without much thought. But ask them how much it varies, and they will most likely have to pause and ...

Calculate the variance of a strided array ignoring NaN values and using a one-pass algorithm proposed by Youngs and Cramer.

S&P Global research found that over the course of the 2010s, the energy sector had a standard deviation of 20.3%, nearly double that of the least volatile sector, consumer staples (10.7%).

Standard deviation tells you how wild those income swings might be. In our example, Job A's steady salary would have a smaller standard deviation (in fact, none at all month to month), while Job B ...