IB Math AA HL · 2021 to 2026
Unit 4: Statistics & Probability
311 past paper questions from 44 papers across 12 exam sessions. See what repeats, then practise the same skills with AI marking.
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HL archive · 2021 to 2026
Unit 4: Statistics & Probability
Latest exam session: May 2026
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Topics in Unit 4: Statistics & Probability
In syllabus order. The ring is the share of the marks each one carries. 1 of them has no matching questions in this archive.
4.1
Sampling & reliability
0% of marks · 2 questions
4.2
Data presentation
1% of marks · 8 questions
4.3
Central tendency & spread
7% of marks · 24 questions
4.4
Correlation & regression
8% of marks · 35 questions
4.5
Probability basics
2% of marks · 8 questions
4.6
Venn diagrams, trees and combined events
23% of marks · 62 questions
4.7
Discrete random variables
7% of marks · 23 questions
4.8
Binomial distribution
10% of marks · 28 questions
4.9
Normal distribution
5% of marks · 19 questions
4.10
Regression & prediction
1% of marks · 7 questions
- No matches in this archiveRevise it
4.12
z-values & inverse normal
9% of marks · 19 questions
4.13
Bayes' theorem (HL only)
2% of marks · 6 questions
4.14
Random variables: variance and continuous distributions (HL only)
24% of marks · 70 questions
- RisingContinuous random variables: the pdf
Exam pattern
How often each micro-topic has been examined, year by year. Each label is explained under the grid.
Does it repeat?
Top 4 of 30 micro-topics for the next sitting. Numbers are questions per year.
fewermore
| Micro-topic | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
|---|---|---|---|---|---|---|
| 3Continuous random variables: the pdf, 2021: 3 questions | 2Continuous random variables: the pdf, 2022: 2 questions | 1Continuous random variables: the pdf, 2023: 1 question | 3Continuous random variables: the pdf, 2024: 3 questions | 8Continuous random variables: the pdf, 2025: 8 questions | 7Continuous random variables: the pdf, 2026: 7 questions | |
| 6Conditional probability, 2021: 6 questions | 2Conditional probability, 2022: 2 questions | 2Conditional probability, 2023: 2 questions | 2Conditional probability, 2024: 2 questions | 5Conditional probability, 2025: 5 questions | 4Conditional probability, 2026: 4 questions | |
| 3Continuous: mean, median, mode, variance, 2021: 3 questions | 3Continuous: mean, median, mode, variance, 2022: 3 questions | 3Continuous: mean, median, mode, variance, 2023: 3 questions | 7Continuous: mean, median, mode, variance, 2024: 7 questions | 11Continuous: mean, median, mode, variance, 2025: 11 questions | 4Continuous: mean, median, mode, variance, 2026: 4 questions | |
| 2Combined events and independence, 2021: 2 questions | 5Combined events and independence, 2022: 5 questions | ·Combined events and independence, 2023: 0 questions | 3Combined events and independence, 2024: 3 questions | 3Combined events and independence, 2025: 3 questions | 3Combined events and independence, 2026: 3 questions |
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- Risingappearing more often in the last two years than before
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Questions on Unit 4: Statistics & Probability, by exam session
Which papers asked about Unit 4: Statistics & Probability, and which question numbers. Open a paper to see them highlighted.
May 2026
15 questions across 7 papers
November 2025
9 questions across 3 papers
May 2025
13 questions across 7 papers
November 2024
4 questions across 2 papers
May 2024
12 questions across 6 papers
November 2023
4 questions across 2 papers
May 2023
11 questions across 4 papers
November 2022
4 questions across 2 papers
May 2022
11 questions across 4 papers
November 2021
4 questions across 2 papers
May 2021
9 questions across 3 papers
Specimen 2021
5 questions across 2 papers
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Frequently asked questions
Short answers about this page.
Which Math AA HL exam sessions are covered for Unit 4: Statistics & Probability?
12 exam sessions from 2021 to 2026, the latest May 2026. Every Paper 1, 2 and 3 in every timezone is read and classified in full, which gives 44 papers in this archive.
Which Unit 4: Statistics & Probability topic comes up most?
Continuous random variables: the pdf (4.14.2): in 24% of papers, last seen May 26 P3 TZ3. Usually "Find", worth about 4.3 marks in a paper that includes it.
Can I see the original question and mark scheme?
No. The wording belongs to the IB. You get the citation, the marks, the command term and the skill tested, plus our own matched practice questions with worked answers and AI marking.
What do "banker", "due" and "rising" mean?
Banker: examined in at least one sitting in four and still appearing. Due: regular before, but absent for the last two exam sessions. Rising: clearly more common in the last two years. Our classification of real papers, not an IB statistic.
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