add stats cat

Author: jamesquinlan

resources/all_resources.md

@@ -173,6 +173,7 @@
 * [SQL (implementation agnostic)](#sql-implementation-agnostic)
 * [SQL Server](#sql-server)
 * [Standard ML](#standard-ml)
+* [Statistics](#statistics)
 * [Subversion](#subversion)
 * [Swift](#swift)
 * [Tcl](#tcl)
@@ -655,6 +656,11 @@
 * [UNIX - The POSIX Standard - IEEE Std 1003.1](https://github.com/geoff-codes/posix-standard)
 
 
+#### Statistics
+
+* [Matloff - Fast Statistics](https://github.com/matloff/fastStat#lesson-sampling--the-notion-of-a-sample)
+
+
 #### Theoretical Computer Science
 
 * [Building Blocks for Theoretical Computer Science](http://mfleck.cs.illinois.edu/building-blocks/index.html) - Margaret M. Fleck