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.

Calculating the standard deviation and T-Value against that data set results in a realistic range against the historic data.

Calculating standard deviation manually can be time-consuming and complex. Excel's STDEV formula can automatically calculate the standard deviation of any set of numbers, so you don't have to go ...

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.

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.