Hey Kentsection.

What is SSW and SST again? (In terms of the symbols you are using? Also note that Var[X+Y] = Var[X] + Var[Y] if X and Y are independent quantities (random variables, samples, etc).

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- Nov 5th 2012, 08:40 PM #1

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## Sst = ssw + ssb

Hi everyone,

I have this problem to solve. It's been a while since I tried to figured out how to do, but I am totally lost.

Here it is.

Prove SST= SSW+SST in one-way Anova (one factor).

Σ ( xi - x̄ )² = Σ (xi - x̄ + x̄ k - x̄ k ) ²

Hint: Σ [ ( xi - x̄ k ) + ( x̄ k - x̄ )]²

Where should I start? Should I try to compute Σ [ ( xi - x̄ k ) + ( x̄ k - x̄ )]² in order to come up with SST= Σ ( xi - x̄ )²

Seriously, I have no idea ...

Any help ?

- Nov 5th 2012, 11:02 PM #2

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