If the mean of a population is 10, which of the following is not a correctly stated null hypothesis for a z-test?
A) H₀: μ ≥ 10
B) H₀: μ = 10
C) H₀: μ ≠ 10
D) H₀: μ ≤ 10

Question

Quizplus · Accepted Answer

The null hypothesis (H₀) for a z-test is typically stated as an equality (μ = value) or inequality (μ ≥ value or μ ≤ value) indicating no effect or difference. Option C, stating the hypothesis as H₀: μ ≠ 10, is not correctly stated as a null hypothesis because it implies a difference and is more appropriate for an alternative hypothesis (H₁).

If the Mean of a Population Is 10, Which of the Following