Exercise 2 Show that $\alpha = \frac{1}{T} \sum_{t=1}^{T} \alpha$ and $\frac{1}{T} \sum_{t=1}^{T} \mu_i = \mu_i$.
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Step 1: The first equation is true because $\alpha$ is a constant, so it can be factored out of the summation. Show more…
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