Define a hypothesis, describe the steps of hypothesis testing, describe and interpret the choice of the null and alternative hypotheses, and distinguish between one-tailed and two-tailed tests of hypotheses.
A is correct. When the null and alternative hypotheses are of the form: H₀ : θ = θ₀ versus H_a : θ≠θ₀ , the correct approach is to use a two-tailed test.