Question: If each block only contains two observations, then we can use a BIBD to estimate a treatment effects. (a) How many blocks will we need

If each block only contains two observations, then we can use a BIBD to estimate a treatment effects.

(a) How many blocks will we need to estimate the parameters for a treatment with a levels?

(b) Prove that the adjusted treatment effects are a function of the data yij only through the dj which are the differences between the two observations in block j. In other words, if I know the differences then I can estimate the treatment effects

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