SAT scores have μ = 1050 and σ = 200. n = 64 students are sampled.
Approximately, what is P(x̄ > 1100)?
- A
≈ 0.4013
- B
≈ 0.5987
- Ccheck_circle
≈ 0.0228
- D
≈ 0.1587
Explanation
σ_x̄ = 200/√64 = 25. z = 50/25 = 2. P(Z > 2) ≈ 0.0228.
Sampling Distributions for Sample Means
AP Statistics· difficulty 3/5
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