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So I'm trying to find E(X1,X2|Xn) where X1,X2,...Xn are the numbers of cell observations in a multinomial distribution. How do I even calculate this? I know it is not independent so I cannot split it.
Does it have something to do with the fact that E(Xi)=nPi ?
Does it have something to do with the fact that E(Xi)=nPi ?