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Excel STDEV.P Function

Excel STDEV.P function
Summary 

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.

Purpose 
Get standard deviation of population
Return value 
Estimated standard deviation
Syntax 
=STDEV.P (number1, [number2], ...)
Arguments 
  • number1 - First number or reference in the sample.
  • number2 - [optional] Second number or reference.
Usage notes 

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

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.

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:

  • STDEV.P calculates standard deviation using the "n" method, ignoring logical values and text.
  • STDEV.P assumes data is an entire population. When data is a sample only, use the STDEV.S function.
  • Numbers are supplied as arguments. They can be supplied as actual numbers, ranges, arrays, or references that contain numbers.
  • To evaluate logical values and/or numbers as text in a reference, use the STDEVA function.

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