Test scores are normally distributed with μ = 70, σ = 8.
Approximately what percent of scores are above 86?
- A
5%
- B
0.15%
- Ccheck_circle
2.5%
- D
16%
Explanation
86 is μ + 2σ. About 95% lie within 2 SDs, so 5% lie outside; half (2.5%) is above μ + 2σ.
The Normal Distribution
AP Statistics· difficulty 3/5
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