Over 48.7% of all statistics are useless.
The quote in KDnuggets News 06:n22,
People commonly use statistics like a drunk uses a lamp post --
for support rather than illumination
was attributed to Mark Twain
but most likely came from another source
"He uses statistics as a drunken man uses lamp-posts-for support rather
Andrew Lang (1844-1912), Scottish author. Quoted in The Harvest of a
Quiet Eye, Alan L. Mackay (1977).
Thanks to John Hinchman for the correction.