What is the most logical next event?

How to calculate standard deviation in excel
Gather the reports that list the data you want to use in your excel spreadsheet.
Keep the data list to a single variable.
Standard deviation is generally used on a small sample of data that needs to be graphed or an entire population.
Excel has different formulas for figuring out the standard deviation of an entire population and the standard deviation of the sample of a population. Keep this in mind when you choose your formula later on.