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

Returns the standard deviation based on a sample.

number1The first number.
number2(Optional) The second number.

Remarks

* STDEV.S was added in Excel 2010 to replace this function.
* The standard deviation is a measure of how widely values are dispersed from the average (or mean) value.
* Arguments that are text or logical values are ignored.
* You can have a maximum of 30 arguments.
* In Excel 2010 the accuracy of this function was improved.
* You can use the STDEVA function to count any arguments that are text or logical values.
* For the Microsoft documentation refer to support.office.com

 A
1=STDEV(10,20,30,40) = 12.910
2=STDEV(1,2,3) = 1.000
3=STDEV(900000001,900000002,900000003) = 1.000


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