How to calculate Standard Deviation in Excel The Standard Deviation is a term used in statistics. The term describes how much the numbers if a set of data vary from the mean.

Pooled standard deviation is a useful tool when analyzing data sets. It is especially helpful when you’ve taken the time to properly weigh your standard deviations so everything is in balance.

Learn the standard deviation formula, how to calculate it, and its importance in data analysis. Step-by-step guide with examples.