diff --git a/reference/statistics/functions/stats-rand-gen-beta.xml b/reference/statistics/functions/stats-rand-gen-beta.xml
index 58433643d4..b8e1b9c665 100755
--- a/reference/statistics/functions/stats-rand-gen-beta.xml
+++ b/reference/statistics/functions/stats-rand-gen-beta.xml
@@ -1,10 +1,10 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.1 $ -->
+<!-- $Revision: 1.2 $ -->
 <!-- Generated by xml_proto.php v2.3. Found in /scripts directory of phpdoc. -->
 <refentry id="function.stats-rand-gen-beta">
  <refnamediv>
   <refname>stats_rand_gen_beta</refname>
-  <refpurpose>Generates beta random deviate. Returns a random deviate from the beta distribution with parameters A and B. The density of the beta is x^(a-1) * (1-x)^(b-1) / B(a,b) for 0 &lt; x &lt 1. aa - first parameter of the beta distribution. bb - second parameter of the beta distribution. Method R. C. H. Cheng</refpurpose>
+  <refpurpose>Generates beta random deviate</refpurpose>
  </refnamediv>
  <refsect1 role="description">
   &reftitle.description;
@@ -13,10 +13,13 @@
    <methodparam><type>float</type><parameter>a</parameter></methodparam>
    <methodparam><type>float</type><parameter>b</parameter></methodparam>
   </methodsynopsis>
-
-  &warn.undocumented.func;
-
+  <para>
+   Returns a random deviate from the beta distribution with parameters A and
+   B. The density of the beta is x^(a-1) * (1-x)^(b-1) / B(a,b) for 0 &lt; x
+   &lt;. Method R. C. H. Cheng.
+  </para>
  </refsect1>
+
  <refsect1 role="parameters">
   &reftitle.parameters;
   <para>
diff --git a/reference/statistics/functions/stats-rand-gen-gamma.xml b/reference/statistics/functions/stats-rand-gen-gamma.xml
index 962e952d1c..85bf7dc65c 100755
--- a/reference/statistics/functions/stats-rand-gen-gamma.xml
+++ b/reference/statistics/functions/stats-rand-gen-gamma.xml
@@ -1,10 +1,10 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.1 $ -->
+<!-- $Revision: 1.2 $ -->
 <!-- Generated by xml_proto.php v2.3. Found in /scripts directory of phpdoc. -->
 <refentry id="function.stats-rand-gen-gamma">
  <refnamediv>
   <refname>stats_rand_gen_gamma</refname>
-  <refpurpose>Generates random deviates from the gamma distribution whose density is (A**R)/Gamma(R) * X**(R-1) * Exp(-A*X). Parameters : a - location parameter of Gamma distribution (a &gt; 0), r - shape parameter of Gamma distribution (r &gt 0)</refpurpose>
+  <refpurpose>Generates random deviates from a gamma distribution</refpurpose>
  </refnamediv>
  <refsect1 role="description">
   &reftitle.description;
@@ -13,10 +13,12 @@
    <methodparam><type>float</type><parameter>a</parameter></methodparam>
    <methodparam><type>float</type><parameter>r</parameter></methodparam>
   </methodsynopsis>
-
-  &warn.undocumented.func;
-
+  <para>
+   Generates random deviates from the gamma distribution whose density is
+   (A**R)/Gamma(R) * X**(R-1) * Exp(-A*X).
+  </para>
  </refsect1>
+
  <refsect1 role="parameters">
   &reftitle.parameters;
   <para>
@@ -25,7 +27,8 @@
      <term><parameter>a</parameter></term>
      <listitem>
       <para>
-       Its description
+       location parameter of Gamma distribution (<parameter>a</parameter>
+       &gt; 0).
       </para>
      </listitem>
     </varlistentry>
@@ -33,7 +36,8 @@
      <term><parameter>r</parameter></term>
      <listitem>
       <para>
-       Its description
+       shape parameter of Gamma distribution (<parameter>r</parameter> &gt;
+       0).
       </para>
      </listitem>
     </varlistentry>
diff --git a/reference/statistics/functions/stats-rand-gen-ipoisson.xml b/reference/statistics/functions/stats-rand-gen-ipoisson.xml
index 42eb8ae34d..b5bbe533ff 100755
--- a/reference/statistics/functions/stats-rand-gen-ipoisson.xml
+++ b/reference/statistics/functions/stats-rand-gen-ipoisson.xml
@@ -1,10 +1,10 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.1 $ -->
+<!-- $Revision: 1.2 $ -->
 <!-- Generated by xml_proto.php v2.3. Found in /scripts directory of phpdoc. -->
 <refentry id="function.stats-rand-gen-ipoisson">
  <refnamediv>
   <refname>stats_rand_gen_ipoisson</refname>
-  <refpurpose>Generates a single random deviate from a Poisson distribution with mean "mu" (mu &gt= 0.0).</refpurpose>
+  <refpurpose>Generates a single random deviate from a Poisson distribution with mean "mu" (mu &gt;= 0.0).</refpurpose>
  </refnamediv>
  <refsect1 role="description">
   &reftitle.description;
diff --git a/reference/statistics/functions/stats-rand-gen-noncentral-t.xml b/reference/statistics/functions/stats-rand-gen-noncentral-t.xml
index 8d0c08f4ba..db31452492 100755
--- a/reference/statistics/functions/stats-rand-gen-noncentral-t.xml
+++ b/reference/statistics/functions/stats-rand-gen-noncentral-t.xml
@@ -1,10 +1,10 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.1 $ -->
+<!-- $Revision: 1.2 $ -->
 <!-- Generated by xml_proto.php v2.3. Found in /scripts directory of phpdoc. -->
 <refentry id="function.stats-rand-gen-noncentral-t">
  <refnamediv>
   <refname>stats_rand_gen_noncentral_t</refname>
-  <refpurpose>Generates a single random deviate from a noncentral T distribution. xnonc - noncentrality parameter. df must be &= 0.0</refpurpose>
+  <refpurpose>Generates a single random deviate from a noncentral T distribution</refpurpose>
  </refnamediv>
  <refsect1 role="description">
   &reftitle.description;
diff --git a/reference/statistics/functions/stats-rand-gen-t.xml b/reference/statistics/functions/stats-rand-gen-t.xml
index 4cfba52467..eeb0f62295 100755
--- a/reference/statistics/functions/stats-rand-gen-t.xml
+++ b/reference/statistics/functions/stats-rand-gen-t.xml
@@ -1,10 +1,10 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.1 $ -->
+<!-- $Revision: 1.2 $ -->
 <!-- Generated by xml_proto.php v2.3. Found in /scripts directory of phpdoc. -->
 <refentry id="function.stats-rand-gen-t">
  <refnamediv>
   <refname>stats_rand_gen_t</refname>
-  <refpurpose>Generates a single random deviate from a T distribution. df must be &gt= 0.0</refpurpose>
+  <refpurpose>Generates a single random deviate from a T distribution</refpurpose>
  </refnamediv>
  <refsect1 role="description">
   &reftitle.description;