math stddev for math> math stddev {flags} 
--sample, -s: calculate sample standard deviation (i.e. using N-1 as the denominator)| input | output | 
|---|---|
| list<number> | number | 
Compute the standard deviation of a list of numbers
> [12345] |math stddev
1.4142135623730951
Compute the sample standard deviation of a list of numbers
> [12345] |math stddev-s
1.5811388300841898
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