[R] Interpreting ANOV output

From: Phillip Good <pigood_at_verizon.net>
Date: Thu 07 Jul 2005 - 10:21:12 EST


My thanks to Douglas Bates and others for pointing out ANOV's limitations. Now the question is how to put my new won knowledge into practice. Before my eyes were opened

   if row effect and interaction were both statistically significant    I would report the row effects separately for each column.

Now

   if row effect and interaction are both statistically significant    i'll realize this may simply be a matter of the test statistics being interdependant (though I might still report the column effects separately if, say, one column was different--in a practical sense--from the rest).

   if neither row nor column nor interaction effects are significant, I'll attribute the result to too small a sample.

(As far as higher-order interactions go, I never really had a clue as to what they were about anyway.)

Phillip Good



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