Normal approximation for p̂ is valid when
- A
n = 5
- B
np = 0.5
- Ccheck_circle
np ≥ 10 AND n(1−p) ≥ 10
- D
Always
Explanation
Large counts rule: at least 10 expected successes and 10 expected failures.
Sampling Distributions for Sample Proportions
AP Statistics· difficulty 4/5
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