Tony,
All sugestions I have seen are on target, IMHO. I also suggest you
consider simply using Excel's built-in Help for such stuff (it won't get
any help-file-of-the-year awards from me, but is fine for the sort of
stuff you ask, and has examples to boot).
Also, if you are interested in using Excel for stat analysis, consider
books by Mike Middleton and Bernard Liengme; at a business-analytic
level, that by Conrad Carlberg; for corrections to Excel's stat
functions, Google-search, within *.excel.*, newsgroup posts by Conrad,
Harlan Grove, Jerry W. Lewis, David J. Braden, Myrna Larsen, Jon Peltier
and Tushar Mehta, among many others. It may seem at first like a morass,
given the state of Excel and perhaps your own expertise, but we will
happily get you through it.
Dave Braden