In this **python tutorial**, you will learn **how to Calculate Standard Deviation** with built in functions of the python programming language.

## How to Calculate Standard Deviation?

Standard deviation is the measure of dispersion of a set of data from its mean. Standard Deviation is calculated by :

where x1, x2, x3, xn are observed values in sample data, is the mean value of observations and N is the number of sample observations

Let’s take a look at the source code, here the values are assigned in the code, the built in functions carry out the function.

RUN CODE SNIPPET# Python Program to Calculate Standard Deviation import statistics sample = [1, 2, 3, 4, 5] print("Standard Deviation of sample is % s " % (statistics.stdev(sample)))

**OUTPUT:**

Standard Deviation of sample is 1.5811388300841898

- At the start we use the
`import statistics`

where the`import`

keyword is used to import the values which the variable`statistics`

holds - Next, we create a simple set of data containing integers
`[1, 2, 3, 4, 5]`

and assign the values to the variable`sample`

respectively. - We declare a
`print`

function we display the statement`("Standard Deviation of sample is % s " % (statistics.stdev(sample)))`

, where the in the place of the variable`s`

, the standard deviation of the values in the variable`sample`

will be displayed.

**NOTE:**

- The
**%s**operator lets you add a value into a Python string - The
**stdev()**is a built in function which can be used to calculate the standard deviation. - The
**print**statement is followed by a period, to initiate the format function. - The print statement/string to be displayed in enclosed in
**double quotes**.

## Leave a Review