When you have the average production of three machines, it is easy to calculate the average or mean production. You just add up the three means and divide by three. But what if I want the average ...

Fact checked by Suzanne Kvilhaug Reviewed by Chip Stapleton For a given data set, standard deviation measures how spread out the numbers are from an average value. This measurement of average variance ...

Investors often use standard deviation to quantify asset volatility. You can calculate standard deviation of an asset in a spreadsheet with a series of daily closing values. Standard deviation ...