rec-sdev1

stdev(X)

W3C sample	WIRIS
[N/A]	$sdev X$

<math xmlns="http://www.w3.org/1998/Math/MathML">
  <apply>
    <csymbol cd="s_data1">sdev</csymbol>
    <ci>X</ci>
  </apply>
</math>

Author: MathML 2 Recomendation