Mathematics, 28.06.2019 12:50, windmadness5331

Two independent random samples have been selected. 100 observations from population 1 and 100 from population 2. sample means ¯x_1=70 and ¯x_2=50 were obtained. from previous experience with these populations, it is known that the variances are σ_1^2=100 and σ_2^2=64. determine the rejection region for the test of h_0: μ_1-μ_2=5 vs h_a: μ_1-μ_2≠5 using α=0.05. (a) z > 1.96 (b) z < -1.96 (c) z < -1.96 and z > 1.96 (d) z < -1.645 and z > 1.645

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Two independent random samples have been selected. 100 observations from population 1 and 100 from p...