Paper 2 · Statistics
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Lesson 19 of 21
Statistics 19 – Hypothesis testing
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- Write H₀ as 'no difference / equal' and put the suspected change in Hₐ
- Compute the z test statistic for means, (x̄−μ)/(σ/√n), and for proportions
- Apply the 5% decision rule: reject H₀ if |z| > 1.96, otherwise fail to reject
- Write the conclusion in real-world language — evidence, never proof
Most recent exam questions
- 2026 P2 Q2(b)(ii)
- 2025 P2 Q10(b) — deferred
- 2025 P2 Q10(c)(i)
- 2024 P2 Q7(b) — deferred
- 2024 P2 Q7(d)
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