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.

Determination There are several practical ways to calculate the mean and standard deviation. Scientific calculators typically come with a built-in program for both the mean and standard deviation.

The standard deviation is calculated by finding the mean, calculating the variance and taking the square root of the variance.

The standard deviation is the square root of the variance. Unfortunately, according to mathematical theory, you can’t do arithmetic operations with standard deviations, although you can with ...

Portfolio variance is calculated using the standard deviation of each security in the portfolio and the correlation between securities in the portfolio.