For an approximately normal distribution, about what percent fall within ±1 SD of the mean?
- Acheck_circle
68%
- B
50%
- C
99.7%
- D
95%
Explanation
68% within ±1σ, 95% within ±2σ, 99.7% within ±3σ.
The Normal Distribution
AP Statistics· difficulty 3/5
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