Learn what analysis of variance (ANOVA) is, how it works, and when to use it. See how it helps compare means across multiple data groups in statistics and research.

Stock's historical variance measures its return stability over time. Higher variance indicates greater return unpredictability and risk. Calculate variance using Excel to simplify the process for ...

Editor's note: This article was originally published in 2016 and has been updated for 2018. We practitioners of the technological arts have a tendency to use specialized jargon. That's not unusual.