WorksheetFunction.StDev_P method (Excel)

Calculates standard deviation based on the entire population given as arguments. The standard deviation is a measure of how widely values are dispersed from the average value (the mean).

Syntax

expression.StDev_P (Arg1, Arg2, Arg3, Arg4, Arg5, Arg6, Arg7, Arg8, Arg9, Arg10, Arg11, Arg12, Arg13, Arg14, Arg15, Arg16, Arg17, Arg18, Arg19, Arg20, Arg21, Arg22, Arg23, Arg24, Arg25, Arg26, Arg27, Arg28, Arg29, Arg30)

expression A variable that represents a WorksheetFunction object.

Parameters

Name	Required/Optional	Data type	Description
Arg1 - Arg30	Required	Variant	Number1, number2... - 1 to 30 number arguments corresponding to a population. You can also use a single array or a reference to an array instead of arguments separated by commas (,).

Return value

Double

Remarks

StDev_P assumes that its arguments are the entire population. If your data represents a sample of the population, compute the standard deviation by using StDev_S.

For large sample sizes, StDev_S and StDev_P return approximately equal values.

The standard deviation is calculated by using the "biased" or "n" method.

Arguments can either be numbers or names, arrays, or references that contain numbers.

Logical values and text representations of numbers that you type directly into the list of arguments are counted.

If an argument is an array or reference, only numbers in that array or reference are counted. Empty cells, logical values, text, or error values in the array or reference are ignored.

Arguments that are error values or text that cannot be translated into numbers cause errors.

StDev_P uses the following formula, where x is the sample mean AVERAGE(number1,number2,...) and n is the sample size:

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