STDEV.S

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

Returns the standard deviation based on a sample.

number1	The first number.
number2	(Optional) The second number.

REMARKS

* The standard deviation is a measure of how Dispersed the values are from the mean.
* Arguments that are text or logical values are ignored.
* You can have a maximum of 255 arguments.
* You can use the STDEVA function to return the standard deviation based on a sample (including logical values and text).
* You can use the STDEV.P function to return the standard deviation based on an entire population.
* You can use the STDEVPA function to return the standard deviation based on an entire population (including logical values and text).
* This function was added in Excel 2010 to replace the STDEV function.
* For the Microsoft documentation refer to support.microsoft.com

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

1 - What is the standard deviation of 10,20,30,40.