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<?xml version="1.0" encoding="ISO-8859-1"?>
<!--
-
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- project.
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- Copyright (C) 1998-2018 OpenLink Software
-
- This project is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by the
- Free Software Foundation; only version 2 of the License, dated June 1991.
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- WITHOUT ANY WARRANTY; without even the implied warranty of
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- General Public License for more details.
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- You should have received a copy of the GNU General Public License along
- with this program; if not, write to the Free Software Foundation, Inc.,
- 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-
-
-->
<refentry id="fn_stddev_pop">
<refmeta>
<refentrytitle>STDDEV_POP</refentrytitle>
<refmiscinfo>aggr</refmiscinfo>
</refmeta>
<refnamediv>
<refname>STDDEV_POP</refname>
<refpurpose>Returns the population standard deviation.</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis id="fsyn_stddev_pop">
<funcprototype id="fproto_stddev_pop">
<funcdef>numeric <function>STDDEV_POP</function></funcdef>
<paramdef>in <parameter>expr</parameter> any</paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1 id="desc_stddev_pop">
<title>Description</title>
<para>STDDEV_POP computes the population standard deviation and returns the square root of the
population variance. This function is the same as the square root of the VAR_POP function.
When VAR_POP returns null, returns null.</para>
</refsect1>
<refsect1 id="params_stddev_pop"><title>Parameters</title>
<refsect2><title>expr</title>
<para>Number expression.</para></refsect2>
</refsect1>
<refsect1 id="ret_stddev_pop"><title>Return Types</title>
<para>The function returns a value of type NUMERIC. If the function is applied to an empty set, then it
returns null.</para>
</refsect1>
<!--
<refsect1 id="errors_stddev_pop">
<title>Errors</title>
<para>This function can generate the following errors:</para>
<errorcode></errorcode>
</refsect1>
-->
<!-- refsect1 id="examples_stddev_pop">
<title>Examples</title>
<example id="ex_"><title></title>
<para></para>
<screen><![CDATA[
]]>
</screen>
</example>
</refsect1 -->
<refsect1 id="seealso_stddev_pop">
<title>See Also</title>
<para><link linkend="fn_var"><function>VAR()</function></link></para>
<para><link linkend="fn_var_samp"><function>VAR_SAMP()</function></link></para>
<para><link linkend="fn_var_pop"><function>VAR_POP()</function></link></para>
<para><link linkend="fn_stddev"><function>STDDEV()</function></link></para>
<para><link linkend="fn_stddev_samp"><function>STDDEV_SAMP()</function></link></para>
<para><link linkend="fn_stddev_pop"><function>STDDEV_POP()</function></link></para>
<para><link linkend="fn_regr_syy"><function>REGR_SYY()</function></link></para>
<para><link linkend="fn_regr_sxx"><function>REGR_SXX()</function></link></para>
<para><link linkend="fn_regr_sxy"><function>REGR_SXY()</function></link></para>
<para><link linkend="fn_regr_avgx"><function>REGR_AVGX()</function></link></para>
<para><link linkend="fn_regr_avgy"><function>REGR_AVGY()</function></link></para>
<para><link linkend="fn_regr_r2"><function>REGR_R2()</function></link></para>
<para><link linkend="fn_regr_count"><function>REGR_COUNT()</function></link></para>
<para><link linkend="fn_regr_intercept"><function>REGR_INTERCEPT()</function></link></para>
<para><link linkend="fn_regr_slope"><function>REGR_SLOPE()</function></link></para>
<para><link linkend="fn_covar_samp"><function>COVAR_SAMP()</function></link></para>
<para><link linkend="fn_covar_pop"><function>COVAR_POP()</function></link></para>
<para><link linkend="fn_corr"><function>CORR()</function></link></para>
</refsect1>
</refentry>
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