Standard deviation
As mentioned in the variance page, variance is just the standard deviation squared. So, to get the standard deviation, we just need to take the square root of the variance.
Standard deviation symbol
Section titled “Standard deviation symbol”The symbol for standard deviation is
Calculating standard deviation
Section titled “Calculating standard deviation”- Find the variance of the set of numbers.
- Take the square root of the variance.
Formula
Section titled “Formula”If we want to substitute our formulae for variance into this, we can get any of: