Which of the following is a directional null hypothesis for an independent samples t test?
A) H₀: μ₁ = μ₂
B) H₀: μ₁ ≤ μ₂
C) H₀: μ₁ ≠ μ₂
D) H₀: μ₁ μ₂

Question

Which of the following is a directional null hypothesis for an independent samples t test?
A) H₀: μ₁ = μ₂
B) H₀: μ₁ ≤ μ₂
C) H₀: μ₁ ≠ μ₂
D) H₀: μ₁ > μ₂

Quizplus · Accepted Answer

A directional null hypothesis specifies a direction of the difference between the means of two groups. Choice A is a non-directional null hypothesis, while choice C specifies a two-tailed alternative hypothesis. Choice D is a directional alternative hypothesis. Only choice B is a directional null hypothesis indicating that the mean of group 1 is less than or equal to the mean of group 2.

Which of the Following Is a Directional Null Hypothesis for an Independent