# Excel STDEVP Function

The STDEVP function calculates the standard deviation for a sample set of data. STDEVP has been replaced with a newer function called STDEV.P, which has the same behavior.

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

The STDEVP 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. The STDEVP function is meant to estimate standard deviation for an entire population. If data represents a sample, use the STDEV function.

*Note: STDEVP has been replaced with a newer function called STDEV.P, which has identical behavior. Although STDEVP still exists for backwards compatibility, Microsoft recommends that people use the newer STDEV.P function instead.*

### Standard Deviation functions in Excel

The table below summarizes the standard deviation functions provided by Excel.

Name | Data set | Text and logicals |
---|---|---|

STDEV | Sample | Ignored |

STDEVP | Population | Ignored |

STDEV.S | Sample | Ignored |

STDEV.P | Population | Ignored |

STDEVA | Sample | Evaluated |

STDEVPA | Population | Evaluated |

Notes:

- STDEVP calculates standard deviation using the "n" method, ignoring logical values and text.
- STDEVP assumes your data is the entire population. When your data is a sample set only, calculate standard deviation using the STDEV function (or it's more current replacement, the STDEV.S function).
- Numbers are supplied as arguments. They can be supplied as actual numbers, ranges, arrays, or references that contain numbers.
- The STDEVP 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.