Test H₀: p = 0.25 vs Hₐ: p ≠ 0.25, with n=400, p̂ = 0.30.
The test statistic is approximately:
- Acheck_circle
2.31
- B
1.96
- C
1.15
- D
0.05
Explanation
z ≈ 0.05/0.02165 ≈ 2.31.
Concluding a Test for a Population Proportion
AP Statistics· difficulty 2/5
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