Which best describes the term "standard error" of x̄?
- A
Always equal to σ/√n.
- B
The bias of x̄.
- C
The mean of x̄.
- Dcheck_circle
An estimate of σ_x̄ when σ is unknown, using s/√n.
Explanation
The SE of x̄ is the estimated SD using the sample SD: s/√n.