Date: Dec 3, 2012 7:22 AM Author: Halitsky Subject: Since 3rd regression computation needs df = 5, am requiring 15<br> observations for any given length singleton in any cell Since the 3rd regression computation needs a df of 5, I am requiring

at least 15 observations for any given length singleton in any cell,

so N-5 >= 10.

If you want a greater cutoff value, please let me know at your

earliest convenience.