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.

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Step 4: Calculate standard deviation of the returns using the STDEV function. Note: The average and standard deviation are expressed as percentages, while the variance is a decimal number.

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.

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.

The equation for the standard error of the mean is the sample standard deviation divided by the square root of the sample size.

But first, here's a look at the formula for calculating annualized volatility. Annualized volatility = standard deviation (volatility) multiplied by the square root of the periods in the year.