Hi, i'm having trouble doing the following question. (It's about two-way analysis of variance). I'd appreciate any help.

Thanks.


Define the sum of squares for factor A as
SSA = bn(sum i=1,...,a)(Y i − Y )^2

By expanding the brackets and considering the expectations of Y^2i and Y^2, show that

E(SSA) = (a − 1)sigma^2+ bn(sum i=1,...,a)alpha^2