Paper 2 · Statistics
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Lesson 16 of 21
Statistics 16 – Margin of error
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- Compute the margin of error for a mean: ME = 1.96·(σ/√n)
- Compute the margin of error for a proportion: ME = 1.96·√(p̂(1−p̂)/n)
- Use the conservative 1/√n estimate only when no specific p̂ or σ is given
- Find the sample size for a target margin of error by solving 1/√n ≤ m
Most recent exam questions
- 2026 P2 Q2(a)
- 2024 P2 Q5(a)(i) — deferred
- 2024 P2 Q5(a)(ii) — deferred
- 2023 P2 Q8(c)
- 2022 P2 Q5(a)(ii)
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