Question: (a) State and explain the GaussMarkov theorem, emphasizing its scope. (b) Discuss how one can use the GaussMarkov theorem to test the significance of the

(a) State and explain the Gauss–Markov theorem, emphasizing its scope.

(b) Discuss how one can use the Gauss–Markov theorem to test the significance of the slope coefficient.

(c) Explain why the least-squares method relates to the Normal distribution and why in the case where the error term has a Laplace or a uniform distribution the method is questionable.

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