The Excel STDEV.P function calculates the standard deviation for a sample set of data. STDEV.P calculates standard deviation using the "n" method, ignoring logical values and text.

Get standard deviation of population

Estimated standard deviation

=STDEV.P (number1, [number2], ...)

**number1**- First number or reference in the sample.**number2**- [optional] Second number or reference.

The STDEV.P function calculates the standard deviation in a sample set of data.

Standard deviation is a measure of how much variance there is in a set of numbers compared to the average (mean) of the numbers.

*Note: STDEV.P replaces the STDEVP function, with identical behavior. Although STDEVP still exists for backwards compatibility, Microsoft recommends that people use the newer STDEV.P function instead.*

Notes:

- STDEV.P calculates standard deviation using the "n" method, ignoring logical values and text.
- STDEV.P assumes your data is the entire population. When your data is a sample set only, calculate standard deviation using the STDEV.S function.
- Numbers are supplied as arguments. They can be supplied as actual numbers, ranges, arrays, or references that contain numbers.
- The STDEV.P function ignores logical values and text. If you want to include logical values and/or numbers as text in a reference, use the STDEVA function.