# Topic Questions: 5.2 Testing the hypothesis that a correlation is zero. — WST03 Regression and correlation > 34 WST03 Regression and correlation topic questions (107 marks) on 5.2 Testing the hypothesis that a correlation is… — 21 papers, 2014–2026. Open the exact… - Canonical HTML: https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-3-wst03/regression-and-correlation/5-2-testing-the-hypothesis-that-a-correlation-is-zero/ - Markdown mirror: https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-3-wst03/regression-and-correlation/5-2-testing-the-hypothesis-that-a-correlation-is-zero/index.md --- Edexcel IAL · Mathematics · WST03 · Regression and correlation 34 WST03 Regression and correlation topic questions are tagged to this syllabus point across 21 papers (2014–2026). Only the parts whose knowledge graph matches this syllabus statement are counted, and the table shows which parts of each question are involved. - 34 topic questions - 21 papers - 107 tagged marks - 53.1% of topic questions - 51.7% of topic marks - 2014–2026 - Syllabus 2014–current - [All WST03 Regression and correlation topic questions](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-3-wst03/regression-and-correlation/) - [All paper codes](https://www.examsci.com/topics/) Core finding **This Regression and correlation syllabus point appears in 21 WST03 papers across 2014–2026, contributing 34 topic questions and 107 marks.** The most recent appearance is WST03/01 January 2026. That equals 53.1% of the 64 topic questions and 51.7% of the 207 marks tagged to Regression and correlation. Only parts tagged to this subtopic are counted, so a four-part question can contribute one item and one part's marks. The table lists every matching question, its tagged parts and marks, with a link back to the paper page. Sessions are newest first, so the statement can be traced back through the full paper history. ## Topic questions by session Newest sessions first. Parts and marks count only the parts tagged to this subtopic; “x of y parts” shows how much of the question is tagged elsewhere. Select the paper cell to open the matching question on the paper page, or use **Go to Practice Hub** to answer that exact question in the Interactive Practice Hub. | Paper | Question | Type | Parts | Marks | Difficulty | Practice | | --- | --- | --- | --- | --- | --- | --- | | [**WST03/01** January 2026 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-3-wst03/2026-january-wst03-01/#q-2) | **Q2** Spearman's Rank Correlation - Jan 2026 Q2 | FRQ | 2 of 3 parts ((a), (b)) | 4 of 6 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=c812093d-e97c-4379-b76c-a478305cbab6&question_id=91d4b471-8a39-4a0c-995e-57772ccb2533&source_detail=WST03%2F01+January+2026) | | [**WST03/02** January 2026 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-3-wst03/2026-january-wst03-02/#q-1) | **Q1** Correlation and Hypothesis Testing - Edexcel IAL Statistics S3 Jan 2026 Q1 | FRQ | 1 of 2 parts ((b)) | 4 of 8 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=15320329-0312-440a-9ea2-5426882898dc&question_id=2bed1a36-44fa-4d09-85ec-0bb8adfa86a8&source_detail=WST03%2F02+January+2026) | | [**WST03/01** June 2025 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-3-wst03/2025-june-wst03-01/#q-2) | **Q2** Spearman's Rank Correlation - Edexcel IAL S3 2025 Jun Q2 | FRQ | 1 of 2 parts ((b)) | 4 of 7 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=94cad3c8-49e2-4f35-aae5-7bd545f67979&question_id=83ba6867-455a-4283-85ee-116c2ce085a6&source_detail=WST03%2F01+June+2025) | | [**WST03/01** January 2025 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-3-wst03/2025-january-wst03-01/#q-1) | **Q1** Spearman's Rank Correlation - Edexcel IAL Statistics S3 Jan 2025 Q1 | FRQ | 1 of 2 parts ((b)) | 4 of 8 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=853580e1-727a-45a9-8743-c66473684646&question_id=bebe3d47-7509-43df-861a-bd66cb6ec7e0&source_detail=WST03%2F01+January+2025) | | [**WST03/01** June 2024 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-3-wst03/2024-june-wst03-01/#q-2) | **Q2** Correlation and Hypothesis Testing - Edexcel IAL Statistics S3 2024 Jun Q2 | FRQ | 1 of 4 parts ((b)) | 4 of 10 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=f7f0aa45-9c3a-48d2-90cb-e489f43a4093&question_id=c02215e9-3fbd-4920-92e2-7493e8e34d1c&source_detail=WST03%2F01+June+2024) | | [**WST03/01** January 2024 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-3-wst03/2024-january-wst03-01/#q-3) | **Q3** Correlation and Hypothesis Testing - Edexcel IAL Statistics S3 January 2024 Q3 | FRQ | 2 of 3 parts ((a), (c)) | 8 of 12 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=385c0d2e-f99e-4051-b5a8-679eaf2f864e&question_id=c0995cf4-48cb-4e5c-8125-0c40a5653344&source_detail=WST03%2F01+January+2024) | | [**WST03/01** June 2023 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-3-wst03/2023-june-wst03-01/#q-1) | **Q1** Correlation Coefficients and Hypothesis Testing - Edexcel IAL Statistics S3 2023 Jun Q1 | FRQ | 2 of 3 parts ((b), (c)) | 7 of 9 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=f10190ac-6670-43f0-92b5-301108969921&question_id=48e41d01-91d6-47e6-8195-5068f4e0d706&source_detail=WST03%2F01+June+2023) | | [**WST03/01** January 2023 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-3-wst03/2023-january-wst03-01/#q-2) | **Q2** Correlation Coefficients and Hypothesis Testing - Edexcel IAL S3 Jan 2023 Q2 | FRQ | 3 of 4 parts ((b), (c), (d)) | 8 of 12 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=37dceb98-c4fd-4068-a019-f82d1480719f&question_id=14ca0f8a-baed-4785-b79e-a84a8e6bee34&source_detail=WST03%2F01+January+2023) | | [**WST03/01** June 2022 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-3-wst03/2022-june-wst03-01/#q-1) | **Q1** Regression and Correlation - Edexcel IAL Statistics S3 2022 Jun Q1 | FRQ | 2 of 4 parts ((c), (d)) | 5 of 10 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b832a197-23cc-4a97-840e-3d725c593e54&question_id=14488625-8e48-4ba1-b4a9-aac2e5f7a27d&source_detail=WST03%2F01+June+2022) | | [**WST03/01** January 2022 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-3-wst03/2022-january-wst03-01/#q-3) | **Q3** Correlation Analysis: PMCC and Spearman's Rank - Edexcel IAL S3 Jan 2022 Q3 | FRQ | 4 of 5 parts ((a), (b), (c), (e)) | 8 of 12 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e83673af-bcc7-4011-b70b-99246231a2d2&question_id=349276ad-6dfc-4e06-a2d8-e46ed98ebcba&source_detail=WST03%2F01+January+2022) | | [**WST03/02** January 2022 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-3-wst03/2022-january-wst03-02/#q-3) | **Q3** Spearman's Rank Correlation - Edexcel IAL Statistics S3 Jan 2022 Q3 | FRQ | 1 of 2 parts ((b)) | 4 of 8 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=6697ab5c-ec5e-4b0f-bdbb-f36fc12e93ea&question_id=fa6edd48-f06c-4479-84dc-9e59e07ba6ff&source_detail=WST03%2F02+January+2022) | | [**WST03/01** October 2021 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-3-wst03/2021-october-wst03-01/#q-3) | **Q3** Correlation Coefficients and Hypothesis Testing - Edexcel IAL Statistics S3 Oct 2021 Q3 | FRQ | 3 of 5 parts ((b), (c), (d)) | 8 of 14 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=0df5b314-5109-4774-8589-3c3c1ab1330a&question_id=cc367617-67f9-4016-b0ba-87ebe9a86358&source_detail=WST03%2F01+October+2021) | | [**WST03/01** June 2021 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-3-wst03/2021-june-wst03-01/#q-1) | **Q1** Soil Moisture and Plant Coverage Correlation - Edexcel IAL Statistics 3 June 2021 Q1 | FRQ | 1 of 2 parts ((b)) | 4 of 9 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=236fc042-3f3e-40da-86a0-4297e8748c7d&question_id=a1812fe5-d9f2-4d0e-b031-b2e66f90dcba&source_detail=WST03%2F01+June+2021) | | [**WST03/01** January 2021 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-3-wst03/2021-january-wst03-01/#q-2) | **Q2** Correlation and Spearman's Rank - Edexcel IAL Statistics S3 Jan 2021 Q2 | FRQ | 1 of 3 parts ((b)) | 3 of 9 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=52db67b4-57f6-4358-97be-19e2362ffe7a&question_id=2fcdbbb2-ba00-42bc-8cd9-5e44b87af578&source_detail=WST03%2F01+January+2021) | | [**WST03/01** October 2020 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-3-wst03/2020-october-wst03-01/#q-3) | **Q3** Spearman's Rank Correlation - Edexcel IAL Statistics S3 June 2020 Q3 | FRQ | 1 of 3 parts ((b)) | 4 of 11 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=603fe04f-c4c9-49f8-9768-4d978b746744&question_id=f22884d5-70e9-480c-8021-71546943cde4&source_detail=WST03%2F01+October+2020) | | [**WST03/01** June 2019 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-3-wst03/2019-june-wst03-01/#q-3) | **Q3** Spearman's Rank Correlation - Edexcel IAL Statistics S3 June 2019 Q3 | FRQ | 1 of 3 parts ((b)) | 4 of 11 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=7627ec36-90f7-46d3-9d56-99726b95349e&question_id=44647a31-9fc5-47da-98b4-0330863f9349&source_detail=WST03%2F01+June+2019) | | [**WST03/01** June 2018 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-3-wst03/2018-june-wst03-01/#q-1) | **Q1** Correlation Coefficients and Hypothesis Testing - Edexcel IAL S3 June 2018 Q1 | FRQ | 2 of 4 parts ((b), (c)) | 6 of 12 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=0d954107-c51f-4452-94e2-f72761ecfcd5&question_id=266f19cf-5b16-424a-80ab-03cbb81abc29&source_detail=WST03%2F01+June+2018) | | [**WST03/01** June 2017 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-3-wst03/2017-june-wst03-01/#q-1) | **Q1** Spearman's Rank Correlation - Edexcel IAL Statistics S3 2017 Jun Q1 | FRQ | 1 of 2 parts ((b)) | 4 of 9 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e5791805-b821-4ba4-9d3a-cd1ac9515a3c&question_id=84ad01b5-73e2-4b5a-bd98-07afdf08c61d&source_detail=WST03%2F01+June+2017) | | [**WST03/01** June 2016 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-3-wst03/2016-june-wst03-01/#q-1) | **Q1** Rank Correlation - Edexcel IAL S3 June 2016 Q1 | FRQ | 1 of 2 parts ((b)) | 4 of 9 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=f6e82544-ef7e-4409-95e9-0f59d3bf62e3&question_id=ae26c6bb-d95b-4489-97fb-45050a39f803&source_detail=WST03%2F01+June+2016) | | [**WST03/01** June 2015 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-3-wst03/2015-june-wst03-01/#q-2) | **Q2** Spearman's Rank Correlation - Edexcel IAL S3 2015 Jun Q2 | FRQ | 1 of 2 parts ((b)) | 4 of 9 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=696adb49-011e-4547-9482-ae0661c007cc&question_id=58202ee3-87a1-4a54-b9cd-8e0f6c9a71b2&source_detail=WST03%2F01+June+2015) | | [**WST03/01** June 2014 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-3-wst03/2014-june-wst03-01/#q-4) | **Q4** Correlation Analysis - Edexcel IAL S3 June 2014 Q4 | FRQ | 2 of 4 parts ((b), (c)) | 6 of 12 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=7e843c99-7424-4422-8a78-6b7e84959866&question_id=416763ed-346b-4adb-af6e-3947fbe499be&source_detail=WST03%2F01+June+2014) | ## Related topic questions in Regression and correlation - [5.1 Spearman's rank correlation coefficient, its use, interpretation and limitations.](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-3-wst03/regression-and-correlation/5-1-spearman-s-rank-correlation-coefficient-its-use-interpretation-and-limitations/) — 34 question items · 21 papers — 112 marks · 2014–2026 ## Topic question rules and edge cases **How many topic questions cover this syllabus point?** 21 question stems cover this subtopic across 21 papers, but only 34 tagged parts and 107 marks belong to it. Other parts of the same questions are assessed under different statements and are excluded from this page. **Which papers include this subtopic?** The table lists every matching session from 2014–2026. Each row links to the question anchor on the paper page, where the full paper context and practice entry point are available. **Why can one question appear under several subtopics?** The parts of one question can assess different syllabus statements. Each part is counted under its own subtopics, so the same question stem can appear on several subtopic pages while each page lists only the parts and marks tagged to that statement. **Can I practise these questions with AI marking?** Yes. Open a paper from the table and use the Interactive Practice Hub entry point. The page itself is static HTML so search engines and retrieval agents can read the full question list without executing JavaScript. --- Full page with native tables, bar charts and Practice Hub links: https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-3-wst03/regression-and-correlation/5-2-testing-the-hypothesis-that-a-correlation-is-zero/