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.

1. Layout the numbers, and for your convenience, put all the numbers in the same role.

2. Click on a blank column and type in =STDEV(choose all columns with numbers in it ex. B1:B12), and then press enter.

3. The Standard Deviation is calculated.