Note:
There are two main types of standard deviation formulas you can use in Google Sheets, depending on your data:
- **STDEV.P** – Used for calculating the standard deviation of a **population** (i.e., when the data represents the entire population).
- **STDEV.S** – Used for calculating the standard deviation of a **sample** (i.e., when the data represents a sample from a larger population).
If your data represents the entire population, you should use **STDEV.P**. If it's just a sample, use **STDEV.S**.