# Derivation of partitioning of total variability

1. May 15, 2012

### mcguiry03

it is a sum of squares in anova(analysis of data). how can i derive this equation?tnx..

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2. May 15, 2012

### viraltux

$-\bar{Y}_{i.} + \bar{Y}_{i.} = 0$

So you can place that anywhere and you change nothing, it is a common trick.

3. May 15, 2012

### mcguiry03

what is my working equation so i can arrive at the sum of squares identity?