Which statement belongs in the null hypothesis?

Answer

μ = 45

Options - A. μ = 45 - B. μ > 45 - C. μ ≠ 45 - D. x̄ = 45 Why - A. Correct — H₀ always carries the equality, about the parameter. - B. A direction is a claim to be shown; it belongs in Hₐ. - C. "Changed" is the two-sided alternative, not the null. - D. x̄ is a statistic, known once the sample is in; hypotheses are about μ.

IBS1 §9.1 (null and alternative), CC BY 4.0; BCc ch 4 ("a dull case with a head start"); H-W9 — shape only; original dataset