Talk:Explained sum of squares

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isn't there a a sample mean missing from the equation?

Yes, there was, and I've fixed it. Can you believe it was also missing from the Total sum of squares article. Btyner 04:20, 10 March 2006 (UTC)

[edit] the grand mean

how is it defined? It is the average of all y. Jackzhp 22:03, 12 October 2006 (UTC)