4. Let Xi, , Xn be iid random variables drawn from the CDF (1-e)Ф0 1 + єФ0.3, where Ф .o is the CDF of normal distribution with mean μ and standard deviation σ. Let σ2-(n-1) variance and σ-MAD/D-1 (0.75) be the MAD estimator of the standard deviation. Using R to approximately compute the asymptotic relative efficiency ARE(82;a?) when є takes values 0, 0.1%, 0.2%,0,5% and 1%. Σ 1 (Xi X
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