Dear David, On Wed, Apr 17, 2013 at 6:24 PM, David Arnold <dwarnold45 at suddenlink.net> wrote: > Hi, [snip] > > D. Before posting to StackExchange, check out the Wikipedia entry for "Behrens-Fisher problem". Cheers, Jay -- G. Jay Kerns, Ph.D. Youngstown State University http://people.ysu.edu/~gkerns/