Sum of squares
Posted: Thu Jun 11, 2009 3:54 am
I have a question regarding "Sum sq.dev" that appears when making the descriptive statistics table for subgroups. Is this the same as "sum of squares" (Sum(x-x(mean))^2)?
Well "sum of squares" usually means Sum(X^2).
However "Sum sq. dev" is calculated as Sum((X-mean(x))^2), which is the formula you give...