Marc I assume you are talking about n(group mean - grand mean)^2 ? Well, it ensures that the more people in a group, the greater the contribution of that group to the SS between, so if one group had twice the N of another group, the larger group makes a larger contribution. But it;s not a dumb question, and we have some savvy statistics people on this group who can address this more precisely .,,.,
========================== John W. Kulig, Ph.D. Professor of Psychology Coordinator, University Honors Plymouth State University Plymouth NH 03264 ========================== ----- Original Message ----- From: "Marc Carter" <[email protected]> To: "Teaching in the Psychological Sciences (TIPS)" <[email protected]> Sent: Wednesday, February 22, 2012 8:57:11 AM Subject: [tips] Dumb question.... Hi, all -- I fear this to be a really stupid question, but... In ANOVA, why are the squared deviations in the SS between groups scaled (multiplied) by _n_? I was once told it was to weight them, but that somehow doesn't seem right. Can someone help? TIA, marc The information contained in this e-mail and any attachments thereto ("e-mail") is sent by Baker University ("BU") and is intended to be confidential and for the use of only the individual or entity named above. The information may be protected by federal and state privacy and disclosures acts or other legal rules. If the reader of this message is not the intended recipient, you are notified that retention, dissemination, distribution or copying of this e-mail is strictly prohibited. If you have received this e-mail in error please immediately notify Baker University by email reply and immediately and permanently delete this e-mail message and any attachments thereto. Thank you. --- You are currently subscribed to tips as: [email protected]. To unsubscribe click here: http://fsulist.frostburg.edu/u?id=13338.f659d005276678c0696b7f6beda66454&n=T&l=tips&o=16204 or send a blank email to leave-16204-13338.f659d005276678c0696b7f6beda66...@fsulist.frostburg.edu --- You are currently subscribed to tips as: [email protected]. To unsubscribe click here: http://fsulist.frostburg.edu/u?id=13090.68da6e6e5325aa33287ff385b70df5d5&n=T&l=tips&o=16206 or send a blank email to leave-16206-13090.68da6e6e5325aa33287ff385b70df...@fsulist.frostburg.edu
