Which of the following are two-tailed tests? A) H₀: μ ≤ 10, H_A: μ 10 B) H₀: μ = 10, H_A: μ ≠ 10 C) H₀: μ ≥ 400, H_A: μ 10 and H₀: μ ≥ 400, H_A: μ

Question

Which of the following are two-tailed tests? A) H₀: μ ≤ 10, H_A: μ > 10 B) H₀: μ = 10, H_A: μ ≠ 10 C) H₀: μ ≥ 400, H_A: μ < 400 D) Both H₀: μ ≤ 10, H_A: μ > 10 and H₀: μ ≥ 400, H_A: μ < 400

Quizplus · Accepted Answer

A two-tailed test is one where the null hypothesis can be rejected if the sample mean is significantly different from the hypothesized value in either direction. Option B is the only one that explicitly states a two-tailed test, with the null hypothesis being μ = 10 and the alternative hypothesis being μ ≠ 10.

Which of the Following Are Two-Tailed Tests