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 Excel > Functions > Statistical > STDEV
 

STDEV(number1 [,number2] [,…])

 
 Returns the standard deviation based on a sample.

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

 REMARKS
 
  		• 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.
     
  		• If you want to count any arguments that are text or logical values you can use the STDEVA() function.
     
  		• For large sample sizes, this function will return approximately the same value as the STDEVP() function.
     
  		• You can have a maximum of 30 arguments.
     
  		• The accuracy of this function was improved in Excel 2003. For more information please refer to this Knowledge Base Article (826349).

     EXAMPLES
     
     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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