A population has σ = 30. Samples of n = 100 are taken.
The standard deviation of x̄ is:
- A
30
- B
0.3
- Ccheck_circle
3
- D
300
Explanation
σ_x̄ = 30/√100 = 30/10 = 3.
Sampling Distributions for Sample Means
AP Statistics· difficulty 2/5
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