How to calculate Standard Deviation in Excel The Standard Deviation is a term used in statistics. The term describes how much the numbers if a set of data vary from the mean.

Excel's STDEV formula can automatically calculate the standard deviation of any set of numbers, so you don't have to go through the math yourself.

With that data you can then calculate the mean average and the standard deviation based on that sample of data. With that, Excel can generate a series of random numbers based on the data entered ...