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.

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.

Key Points Use Excel to calculate daily returns and standard deviation to gauge stock volatility. Annualize volatility by multiplying daily standard deviation by the square root of 252.