Paper 2 · Statistics
⏱ Tested in 5 exam questions since 2015
Lesson 20 of 21
Statistics 20 p-values and critical regions
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- Compute the p-value for a two-tailed test: p = 2 × P(z ≥ |z|)
- Conclude by comparing the p-value to 0.05: reject H₀ if p ≤ 0.05
- Interpret the p-value as the chance of data this extreme if H₀ were true
- Show the p-value and |z| > 1.96 critical-region rules always agree
Most recent exam questions
- 2025 P2 Q10(c)(ii)
- 2022 P2 Q7(e)(ii) — deferred
- 2021 P2 Q8(b)(ii)
- 2019 P2 Q8(b)(i)
- 2015 P2 Q2(c)
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