I think "ANOVA" means ""Analysis of Variance."
http://mathworld.wolfram.com/ANOVA.html
In Excel XP Help, the topic..
"About statistical analysis tools"
it says..."
The Anova analysis tools provide different types of variance analysis. The
tool to use depends on the number of factors and the number of samples you
have from the populations you want to test.
HTH
Dana DeLouis