Original source: http://web.archive.org/web/20061013125819/http://nostoc.stanford.edu/jeff/cllib/lhstats.lisp
As of 2011-12-03, Quicklisp uses this version on github, with patches for SBCL: https://github.com/mrc/lhstats
Stats
Stats by Larry Hunter is a statistics library. A fairly extensive set of statistical functions in Common Lisp.