The standard deviation is a mathematical term, and symbolizes the measurement of how spread out outlaid numbers are. We are going to make the standard deviation calculation.

## Example 1 How to calculate Standard Deviation using STDEV Excel function?

Let's start from preparing your data. For this data we will see how to calculate Standard Deviation here.

Click on a blank column and type in **=STDEV**(choose all columns with numbers in it ex. **A1:A11**), and then press enter.

The Standard Deviation is calculated.

Simple and quick. Luckily Excel has dedicated STDEV function for Standard Deviation calculations. There are also other Excel functions:

- STDEV.P - standard deviation of population
- STDEV.S - sample standard deviation
- STDEVA - sample standard deviation which does not ignore logical values
- STDEVPA - standard deviation of population which does not ignore logical values

## Example 2 Calculate Skewness using Data Analysis ToolPak Add-In

First you need to make sure your Data Analysis Toolpak Add-In is installed. Here is the lesson how to install Data Analysis Toolpak Add-In.

Go to Ribbon to the **Data** tab. Click the **Data Analysis** button.

New window appears. Choose **Descriptive Statistics** and click **OK**.

Enter the proper parameters:

**Input Range**- range of your data (**$A$1:$A$11**in my example)**Labels in first row**- there are no labels in my data table**Output Range**- choose where you want to get your skewness calculated (I chose the same Sheet**$F$1:$G$14**)**Summary statistics**- make sure it is checked

And this is how to see my Statistics summary. Standard Deviation is calculated in row 7. The result is the same as in the Example 1 where we checked how to calculate Standard Deviation using STDEV Excel function.

Excel really helps you with statistics. Hopely now you can see that.

Further reading: Statistical process control chart Calculating forecast accuracy and precision How to calculate the variance in Excel?