# WST01 Topic Questions — Edexcel IAL Statistics 1

> Edexcel IAL Statistics 1: 6 topics with 1111 WST01 topic questions from 36 papers (2014–2026). Browse questions by topic, then open the exact past-paper…

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Edexcel IAL · Mathematics · A Level

Practise WST01 topic questions by topic. 6 topics from the 2014–current syllabus are drawn from 36 papers (2014–2026). Each topic below opens every past-paper question tagged to its syllabus points.

- WST01
- 36 papers
- 1,111 topic questions
- 2,700 marks
- Syllabus 2014–current
- [Browse WST01 papers](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/)
- [All paper codes](https://www.examsci.com/topics/)

Core finding

**Probability leads WST01 with 291 topic questions and 749 marks across 36 papers.** Representation and summary of data follows with 270 topic questions and 629 marks. The current 2014–current dataset covers 6 topics, 1,111 topic questions and 2,700 marks. Each MCQ or structured part counts as one item, and each topic counts only the parts tagged to it, so the ranking reflects exam exposure rather than the number of question stems. Rows also carry paper count, mark total and year range for cross-unit comparison. The native table reproduces every figure in curriculum order.

## Topic question count and mark distribution

Topics are on the vertical axis and sorted from highest to lowest. Only the parts whose knowledge graph matches a topic are counted for that topic, and percentages are each row's share of the tagged total in that chart. A part tagged to several topics is counted in each bar, so the bars are not a partition of the unit total.

### Questions by topic

question items

- [Probability](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/probability/) (36 papers) — 291 · 24.7%
- [Representation and summary of data](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/representation-and-summary-of-data/) (36 papers) — 270 · 22.9%
- [Correlation and regression](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/correlation-and-regression/) (36 papers) — 239 · 20.3%
- [Discrete random variables](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/discrete-random-variables/) (36 papers) — 227 · 19.3%
- [The Normal distribution](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/the-normal-distribution/) (36 papers) — 139 · 11.8%
- [Mathematical models in probability and statistics](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/mathematical-models-in-probability-and-statistics/) (9 papers) — 11 · 0.9%

### Marks by topic

marks

- [Probability](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/probability/) (36 papers) — 749 · 25.8%
- [Representation and summary of data](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/representation-and-summary-of-data/) (36 papers) — 629 · 21.6%
- [Discrete random variables](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/discrete-random-variables/) (36 papers) — 550 · 18.9%
- [Correlation and regression](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/correlation-and-regression/) (36 papers) — 498 · 17.1%
- [The Normal distribution](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/the-normal-distribution/) (36 papers) — 453 · 15.6%
- [Mathematical models in probability and statistics](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/mathematical-models-in-probability-and-statistics/) (9 papers) — 29 · 1.0%

## Topic comparison matrix

Curriculum order is by syllabus number, then alphabetically. Every topic links to its subtopic index.

| Topic | Subtopics | Topic questions | Papers | Marks | Years | |
| --- | --- | --- | --- | --- | --- | --- |
| **[Correlation and regression](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/correlation-and-regression/)** | 3 | 239 | 36 | 498 | 2014–2026 | [Open topic questions](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/correlation-and-regression/) |
| **[Discrete random variables](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/discrete-random-variables/)** | 4 | 227 | 36 | 550 | 2014–2026 | [Open topic questions](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/discrete-random-variables/) |
| **[Mathematical models in probability and statistics](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/mathematical-models-in-probability-and-statistics/)** | 1 | 11 | 9 | 29 | 2014–2025 | [Open topic questions](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/mathematical-models-in-probability-and-statistics/) |
| **[Probability](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/probability/)** | 5 | 291 | 36 | 749 | 2014–2026 | [Open topic questions](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/probability/) |
| **[Representation and summary of data](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/representation-and-summary-of-data/)** | 4 | 270 | 36 | 629 | 2014–2026 | [Open topic questions](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/representation-and-summary-of-data/) |
| **[The Normal distribution](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/the-normal-distribution/)** | 1 | 139 | 36 | 453 | 2014–2026 | [Open topic questions](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/the-normal-distribution/) |

## Browse all topic questions

- [Correlation and regression](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/correlation-and-regression/) — 239 question items · 36 papers — 3 subtopics · 498 marks · 2014–2026
- [Discrete random variables](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/discrete-random-variables/) — 227 question items · 36 papers — 4 subtopics · 550 marks · 2014–2026
- [Mathematical models in probability and statistics](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/mathematical-models-in-probability-and-statistics/) — 11 question items · 9 papers — 1 subtopics · 29 marks · 2014–2025
- [Probability](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/probability/) — 291 question items · 36 papers — 5 subtopics · 749 marks · 2014–2026
- [Representation and summary of data](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/representation-and-summary-of-data/) — 270 question items · 36 papers — 4 subtopics · 629 marks · 2014–2026
- [The Normal distribution](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/the-normal-distribution/) — 139 question items · 36 papers — 1 subtopics · 453 marks · 2014–2026

## Other Mathematics paper codes

- [D1 428 question items](https://www.examsci.com/topics/edexcel-ial/mathematics/decision-mathematics-1-wdm11/)
- [FP1 649 question items](https://www.examsci.com/topics/edexcel-ial/mathematics/further-pure-mathematics-1-wfm01/)
- [FP2 383 question items](https://www.examsci.com/topics/edexcel-ial/mathematics/further-pure-mathematics-2-wfm02/)
- [FP3 392 question items](https://www.examsci.com/topics/edexcel-ial/mathematics/further-pure-mathematics-3-wfm03/)
- [M1 701 question items](https://www.examsci.com/topics/edexcel-ial/mathematics/mechanics-1-wme01/)
- [M2 637 question items](https://www.examsci.com/topics/edexcel-ial/mathematics/mechanics-2-wme02/)
- [M3 440 question items](https://www.examsci.com/topics/edexcel-ial/mathematics/mechanics-3-wme03/)
- [P1 645 question items](https://www.examsci.com/topics/edexcel-ial/mathematics/pure-mathematics-1-wma11/)
- [P2 600 question items](https://www.examsci.com/topics/edexcel-ial/mathematics/pure-mathematics-2-wma12/)
- [P3 550 question items](https://www.examsci.com/topics/edexcel-ial/mathematics/pure-mathematics-3-wma13/)
- [P4 432 question items](https://www.examsci.com/topics/edexcel-ial/mathematics/pure-mathematics-4-wma14/)
- [S2 956 question items](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-2-wst02/)
- [S3 437 question items](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-3-wst03/)

## Topic questions: rules and edge cases

**Where can I find WST01 topic questions?**

This page groups every WST01 topic question by topic and syllabus point. Open a topic to see the question numbers, marks and the session each one comes from, then follow the link into the original paper.

**How many topics are in the current WST01 syllabus?**

This page lists 6 topics tagged to the current syllabus across 36 WST01 papers (2014–2026). Topics are ordered by syllabus number, then alphabetically.

**How are question counts and marks calculated?**

Each MCQ counts as one question item and each structured part counts as one item. Marks come from the official part marks. Only parts whose knowledge graph matches a topic are counted, and a part tagged to more than one topic is counted against each topic, so topic rows describe exam exposure rather than a partition of the paper.

**Why is there no topic chart on the D1 index?**

The D1 index intentionally stops at the paper-code level. Topic names are only shown after a code is selected, which prevents two units from claiming the same topic phrase or URL.

**Which sessions are included?**

All sessions tagged to the current syllabus are included, covering 2014–2026. Questions without a recognised syllabus tag are treated as current so they do not disappear from the index.

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Full page with native tables, bar charts and Practice Hub links: https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/