Drug A: μ_A = 8, σ_A = 2, n_A = 50. Drug B: μ_B = 6, σ_B = 2, n_B = 50.
What is σ_(x̄_A − x̄_B)?
- Acheck_circle
≈ 0.4
- B
≈ 0.08
- C
≈ 2
- D
≈ 4
Explanation
SD = √(4/50 + 4/50) = √(0.16) = 0.4.
Sampling Distributions for Differences in Sample Means
AP Statistics· difficulty 3/5
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