Select the sample or population, enter the comma-separated data values in the required input field and click calculate to find sample or population standard deviations using standard deviation calculator. 
The Extension of Standard Deviation Calculator is a tool to find the STD of a set of sample or population data within your browser. 
This extension of standard deviation calculator does not require that you search for the right website URL or even remember the exact website URL. 
We built this extension with people who will always be in front of you. If you have too many extensions installed you just have to click on the extension button to access it. 
====How to use this extension?==== 
1) The calculator will appear in a pop-up window in front of you just after clicking on the standard deviation calculator icon in your extension tray. 
2) Enter your set of a comma-separated sample or population data in the input area, and don't worry about wrong input; the input validation is very intelligent; it won't let you enter wrong information in the text area.