# WST01 Correlation and regression Topic Questions

> Edexcel IAL WST01: every Correlation and regression topic question from 36 papers (2014–2026), grouped by syllabus point. 239 questions, 498 marks, with…

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Edexcel IAL · Mathematics · WST01 · A Level

Every WST01 Correlation and regression topic question from the 2014–current syllabus, drawn from 36 papers (2014–2026) and grouped by syllabus point. Each row opens a page listing the exact question numbers, marks and a direct link into the paper. These are questions by topic, not full papers, so you can revise one topic at a time.

- WST01
- 3 subtopics
- 239 topic questions
- 36 papers
- 498 tagged marks
- [Back to Correlation and regression](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/correlation-and-regression/)
- [All paper codes](https://www.examsci.com/topics/)

Core finding

**4.3 The product moment correlation coefficient, its use… is the most frequently assessed subtopic in Correlation and regression, with 100 topic questions and 198 marks across 36 papers.** 4.1 Scatter diagrams. Linear regression. follows with 82 topic questions and 212 marks. The topic contains 3 subtopics, 239 topic questions and 498 marks in total. Rows count only the parts tagged to that subtopic, keep the same colour in both charts and repeat paper count, tagged marks and year range in the native table.

## Topic question count and mark distribution

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

### Questions by subtopic

question items

- [4.3 The product moment correlation coefficient, its use, interpretation and limitations.](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/correlation-and-regression/4-3-the-product-moment-correlation-coefficient-its-use-interpretation-and-limitations/) (36 papers) — 100 · 37.9%
- [4.1 Scatter diagrams. Linear regression.](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/correlation-and-regression/4-1-scatter-diagrams-linear-regression/) (36 papers) — 82 · 31.1%
- [4.2 Explanatory (independent) and response (dependent) variables. Applications and interpretations.](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/correlation-and-regression/4-2-explanatory-independent-and-response-dependent-variables-applications-and/) (35 papers) — 82 · 31.1%

### Marks by subtopic

marks

- [4.1 Scatter diagrams. Linear regression.](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/correlation-and-regression/4-1-scatter-diagrams-linear-regression/) (36 papers) — 212 · 38.2%
- [4.3 The product moment correlation coefficient, its use, interpretation and limitations.](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/correlation-and-regression/4-3-the-product-moment-correlation-coefficient-its-use-interpretation-and-limitations/) (36 papers) — 198 · 35.7%
- [4.2 Explanatory (independent) and response (dependent) variables. Applications and interpretations.](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/correlation-and-regression/4-2-explanatory-independent-and-response-dependent-variables-applications-and/) (35 papers) — 145 · 26.1%

## Subtopic comparison matrix

Curriculum order is by syllabus number, then alphabetically. Every row links to the matching past-paper question list.

| Subtopic | Topic questions | Papers | Marks | Years | |
| --- | --- | --- | --- | --- | --- |
| **[4.1 Scatter diagrams. Linear regression.](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/correlation-and-regression/4-1-scatter-diagrams-linear-regression/)** | 82 | 36 | 212 | 2014–2026 | [Open topic questions](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/correlation-and-regression/4-1-scatter-diagrams-linear-regression/) |
| **[4.2 Explanatory (independent) and response (dependent) variables. Applications and interpretations.](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/correlation-and-regression/4-2-explanatory-independent-and-response-dependent-variables-applications-and/)** | 82 | 35 | 145 | 2014–2026 | [Open topic questions](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/correlation-and-regression/4-2-explanatory-independent-and-response-dependent-variables-applications-and/) |
| **[4.3 The product moment correlation coefficient, its use, interpretation and limitations.](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/correlation-and-regression/4-3-the-product-moment-correlation-coefficient-its-use-interpretation-and-limitations/)** | 100 | 36 | 198 | 2014–2026 | [Open topic questions](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/correlation-and-regression/4-3-the-product-moment-correlation-coefficient-its-use-interpretation-and-limitations/) |

## Browse every topic question

- [4.1 Scatter diagrams. Linear regression.](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/correlation-and-regression/4-1-scatter-diagrams-linear-regression/) — 82 question items · 36 papers — 212 marks · 2014–2026
- [4.2 Explanatory (independent) and response (dependent) variables. Applications and interpretations.](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/correlation-and-regression/4-2-explanatory-independent-and-response-dependent-variables-applications-and/) — 82 question items · 35 papers — 145 marks · 2014–2026
- [4.3 The product moment correlation coefficient, its use, interpretation and limitations.](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/correlation-and-regression/4-3-the-product-moment-correlation-coefficient-its-use-interpretation-and-limitations/) — 100 question items · 36 papers — 198 marks · 2014–2026

## Other topics in WST01

- [Discrete random variables 227 question items](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/discrete-random-variables/)
- [Mathematical models in probability and statistics 11 question items](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/mathematical-models-in-probability-and-statistics/)
- [Probability 291 question items](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/probability/)
- [Representation and summary of data 270 question items](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/representation-and-summary-of-data/)
- [The Normal distribution 139 question items](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/the-normal-distribution/)

## Topic question rules and edge cases

**How many subtopics does Correlation and regression contain?**

This page lists 3 subtopics tagged to the current syllabus. They are ordered by syllabus number, then alphabetically, and each row opens a page of matching past-paper questions.

**How are the subtopic question and mark totals calculated?**

A multiple-choice question contributes one item and its marks to every subtopic it is tagged with. A structured question contributes one item per tagged part, and that part’s marks; untagged parts of the same question are not counted here. A part tagged to several subtopics therefore appears under each of them.

**Why do some subtopics have no numbered prefix?**

Practical-skills statements and some syllabus bullets are unnumbered. Numbered statements come first; unnumbered statements and ties are sorted alphabetically.

**Is the LaTeX rendered without JavaScript?**

Yes. Subtopics that contain formulas are converted to static KaTeX HTML during the build, and the KaTeX stylesheet is served from the same site.

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