Question: Consider Y1,..., Yn as defined in Exercise 7.19. a. Show that Yi/xi is an unbiased estimator of . b. Calculate the exact variance of Yi/xi

Consider Y1,..., Yn as defined in Exercise 7.19.
a. Show that ∑Yi/∑xi is an unbiased estimator of β.
b. Calculate the exact variance of ∑Yi/∑xi xi and compare it to the variance of the MLE.

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