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On the same graph, plot the power functions for the two-sided z-test of H0 : (a) What do you…

On the same graph, plot the power functions for the two-sided z-test of H0 : On the same graph, plot the power functions for the two-sided z-test of H0 : (a) What do you...

(a) What do you observe about these graphs?

(b) Explain how these graphs demonstrate the unbiasedness of this test.