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Q21Section I (Objective (Q1–Q80))21 of 80

Statistical Inference — comparing two tests for a normal mean shift

Let x1,x2,x3,…,x16x_1, x_2, x_3, …, x_{16} be a random sample from N(μ,1)N(\mu, 1) distribution, μ∈R\mu \in R. Consider two tests φ1(x)\varphi_1(x) and φ2(x)\varphi_2(x) to test H0:μ=3H_0 : \mu = 3 versus H1:μ=4H_1 : \mu = 4: φ1(x)=1\varphi_1(x) = 1 if x1≥5x_1 \ge 5, else 00, and φ2(x)=1\varphi_2(x) = 1 if xˉ≥3.5\bar{x} \ge 3.5, else 00. If αi\alpha_i and βi\beta_i; i=1,2i = 1, 2 are size and type II error of the two tests respectively, then which one of the following is correct?

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