The Null Hypothesis for a One-Tailed Independent-Groups T Test States $\mu$

Multiple Choice

The null hypothesis for a one-tailed independent-groups t test states that:

A) H₀: $\mu$ ₁ $\geq$ $\mu$ ₂, or H₀: $\mu$ ₁ $\leq$ $\mu$ ₂.
B) H₀: $\mu$ ₁ = $\mu$ ₂.
C) H_a: $\mu$ ₁ $\not =$$\mu$ ₂.
D) H_a: $\mu$ ₁ $\leq$ $\mu$ ₂.