# Topic Questions: 4.1 Scatter diagrams. Linear regression. — WST01 Correlation and regression > 82 WST01 Correlation and regression topic questions (212 marks) on 4.1 Scatter diagrams. Linear regression. — 36 papers, 2014–2026. Open the exact question… - Canonical HTML: https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/correlation-and-regression/4-1-scatter-diagrams-linear-regression/ - Markdown mirror: https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/correlation-and-regression/4-1-scatter-diagrams-linear-regression/index.md --- Edexcel IAL · Mathematics · WST01 · Correlation and regression 82 WST01 Correlation and regression topic questions are tagged to this syllabus point across 36 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. - 82 topic questions - 36 papers - 212 tagged marks - 34.3% of topic questions - 42.6% of topic marks - 2014–2026 - Syllabus 2014–current - [All WST01 Correlation and regression topic questions](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/correlation-and-regression/) - [All paper codes](https://www.examsci.com/topics/) Core finding **This Correlation and regression syllabus point appears in 36 WST01 papers across 2014–2026, contributing 82 topic questions and 212 marks.** The most recent appearance is WST01/01 January 2026. That equals 34.3% of the 239 topic questions and 42.6% of the 498 marks tagged to Correlation and regression. 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 | | --- | --- | --- | --- | --- | --- | --- | | [**WST01/01** January 2026 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2026-january-wst01-01/#q-2) | **Q2** Correlation and Least Squares Regression - Edexcel IAL S1 Jan 2026 Q2 | FRQ | 1 of 6 parts ((e)) | 3 of 12 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=24109888-8a15-4c84-8b20-c8c4906c9e9f&question_id=dacc8d9c-7157-4d22-b322-7324b9eac11f&source_detail=WST01%2F01+January+2026) | | [**WST01/02** January 2026 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2026-january-wst01-02/#q-3) | **Q3** Correlation and Regression - Jan 2026 Q3 | FRQ | 2 of 6 parts ((d), (e)) | 7 of 15 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=1f357306-d07a-49ec-842d-c971dee0e0cd&question_id=150c2276-86fa-428f-97b7-176cc7a6bf7d&source_detail=WST01%2F02+January+2026) | | [**WST01/01** October 2025 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2025-october-wst01-01/#q-1) | **Q1** Correlation and Regression on Horse Heights and Weights | FRQ | 1 of 6 parts ((c)) | 3 of 12 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=25b5937a-ecc4-4683-af4d-df8053d3ef1d&question_id=8ef983fe-a27e-4043-8a3d-635372601f06&source_detail=WST01%2F01+October+2025) | | [**WST01/02** October 2025 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2025-october-wst01-02/#q-1) | **Q1** Correlation and Regression - Edexcel IAL S1 October 2025 Q1 | FRQ | 1 of 7 parts ((e)) | 4 of 12 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e7a37483-4ba0-4b94-8523-01cb41b4f829&question_id=4afe853d-669f-4fb4-b5db-2489d51e010d&source_detail=WST01%2F02+October+2025) | | [**WST01/01** June 2025 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2025-june-wst01-01/#q-3) | **Q3** Correlation and Linear Regression - Edexcel IAL June 2025 S1 Q3 | FRQ | 2 of 8 parts ((f), (g)) | 4 of 14 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=eaaae1ba-24f5-41af-a961-a10e48255aea&question_id=cc0ce4c4-ed7c-448c-a215-00f1f9103e44&source_detail=WST01%2F01+June+2025) | | [**WST01/01** January 2025 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2025-january-wst01-01/#q-6) | **Q6** Correlation and Linear Regression - Edexcel IAL S1 Jan 2025 Q6 | FRQ | 4 of 7 parts ((b), (c), (e)(ii), (e)(iii)) | 8 of 12 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=7c231f6c-f773-49d3-90ff-374502de2488&question_id=4fbb782e-4bf3-4958-986b-fe7cfbfa1962&source_detail=WST01%2F01+January+2025) | | [**WST01/01** October 2024 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2024-october-wst01-01/#q-2) | **Q2** Correlation and Regression - Edexcel IAL S1 Oct 2024 Q2 | FRQ | 2 of 6 parts ((c), (d)) | 5 of 11 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=05dfad24-ee91-470d-bedb-93d7a93723b5&question_id=0dce76ea-0540-4b47-aa08-36fc90c255c9&source_detail=WST01%2F01+October+2024) | | [**WST01/01** June 2024 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2024-june-wst01-01/#q-4) | **Q4** Correlation and Regression - Edexcel IAL Statistics S1 June 2024 Q4 | FRQ | 2 of 6 parts ((a), (c)) | 6 of 13 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=ba43818b-3c06-484a-8b01-c383055544be&question_id=8a7d5c11-1c8e-4c6e-ad8c-a7b9bb653830&source_detail=WST01%2F01+June+2024) | | [**WST01/01** January 2024 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2024-january-wst01-01/#q-4) | **Q4** Language Test Marks Outliers and Regression - Edexcel IAL S1 Jan 2024 Q4 | FRQ | 1 of 5 parts ((b)) | 3 of 12 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=bd6d9976-7db6-4123-bb8d-dc26f9a639ae&question_id=0bbf48b5-29ed-4db0-921e-23f01580d3bc&source_detail=WST01%2F01+January+2024) | | [**WST01/01** October 2023 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2023-october-wst01-01/#q-6) | **Q6** Intersection of Regression Lines and PMCC - Edexcel IAL Statistics S1 Oct 2023 Q6 | FRQ | 3 of 4 parts ((a)(i), (a)(ii), (b)) | 8 of 12 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=64e87e3b-3797-4577-a7b5-9a5f0d3c7412&question_id=731243bc-8bcd-4ea3-8f68-2300b0bd620e&source_detail=WST01%2F01+October+2023) | | [**WST01/01** June 2023 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2023-june-wst01-01/#q-2) | **Q2** Correlation and Linear Regression - Edexcel IAL S1 Jun 2023 Q2 | FRQ | 3 of 7 parts ((a), (c), (g)) | 7 of 13 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=10c8a3bf-4c2c-43fa-81ce-07dc4d4f7e3f&question_id=e2ac931d-6260-44e8-aade-a6614d092e66&source_detail=WST01%2F01+June+2023) | | [**WST01/01** January 2023 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2023-january-wst01-01/#q-6) | **Q6** Linear Regression and Correlation Analysis - Edexcel IAL S1 January 2023 Q6 | FRQ | 2 of 5 parts ((b), (e)) | 4 of 14 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e737c446-6240-468d-9e31-1cba09717d09&question_id=578dd054-56c3-4e9d-881d-5c9c378df084&source_detail=WST01%2F01+January+2023) | | [**WST01/01** October 2022 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2022-october-wst01-01/#q-2) | **Q2** Film Cost and Ticket Sales Correlation and Regression - Edexcel IAL S1 Oct 2022 Q2 | FRQ | 3 of 6 parts ((d), (e), (f)) | 7 of 13 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=2be0662d-5d5f-4f88-937a-430b5bb831d8&question_id=52318457-9b6e-4294-aa87-c362739d94ef&source_detail=WST01%2F01+October+2022) | | [**WST01/01** June 2022 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2022-june-wst01-01/#q-2) | **Q2** Correlation and Regression - PMCC, Regression Equation, and Interpretations | FRQ | 1 of 7 parts ((c)) | 4 of 14 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=98e5a69c-d09d-42bb-abc2-4fb56ab2814a&question_id=a2bb7ec0-143d-4c32-b743-8deb98bc617d&source_detail=WST01%2F01+June+2022) | | [**WST01/01** January 2022 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2022-january-wst01-01/#q-6) | **Q6** Linear Regression and Residuals - Edexcel IAL S1 Jan 2022 Q6 | FRQ | 4 of 6 parts ((a), (d), (e), (f)) | 11 of 13 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=7de5bf95-3af8-43f6-ab08-d335d399d3b1&question_id=805bd6b5-d503-427c-a63d-8f9fff784128&source_detail=WST01%2F01+January+2022) | | [**WST01/01** October 2021 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2021-october-wst01-01/#q-2) | **Q2** Correlation and Regression - Edexcel IAL S1 Oct 2021 Q2 | FRQ | 2 of 5 parts ((a), (c)) | 5 of 12 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=8afe31c0-83e4-44f0-a07a-cdf6bd2d8b59&question_id=8f9215bc-ce58-400f-9e6d-30630b19a315&source_detail=WST01%2F01+October+2021) | | [**WST01/01** June 2021 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2021-june-wst01-01/#q-6) | **Q6** Correlation and Regression - Edexcel IAL S1 Jun 2021 Q6 | FRQ | 2 of 7 parts ((a), (b)) | 5 of 16 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=05f14f9e-5115-4795-956d-48ffb42b7f57&question_id=349190f9-a606-4a18-aca9-88cf5d55c02a&source_detail=WST01%2F01+June+2021) | | [**WST01/01** January 2021 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2021-january-wst01-01/#q-5) | **Q5** Correlation and Regression Analysis - Edexcel IAL S1 Jan 2021 Q5 | FRQ | 4 of 10 parts ((d), (e), (g), (h)) | 8 of 17 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=47377eb9-33d0-48b6-bf89-6bfd7f53bfef&question_id=6cebc033-a7c1-4708-a51e-f07b69a51bbd&source_detail=WST01%2F01+January+2021) | | [**WST01/01** October 2020 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2020-october-wst01-01/#q-5) | **Q5** Correlation and Regression - Edexcel IAL S1 Oct 2020 Q5 | FRQ | 2 of 6 parts ((a), (e)) | 5 of 15 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=d767123a-c14c-4339-8451-efe3392dc3f6&question_id=00e86b2e-0fb7-49f9-9a2e-45797ca78b07&source_detail=WST01%2F01+October+2020) | | [**WST01/01** January 2020 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2020-january-wst01-01/#q-3) | **Q3** Correlation and Regression - Washing Machines and Guarantees | FRQ | 2 of 7 parts ((a), (e)) | 5 of 13 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=060e1276-04a8-4c55-9feb-db156686577a&question_id=2547a150-3a14-41a0-a85d-12da26f21afd&source_detail=WST01%2F01+January+2020) | | [**WST01/01** October 2019 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2019-october-wst01-01/#q-1) | **Q1** Correlation and Regression - Edexcel IAL Statistics S1 Oct 2019 Q1 | FRQ | 2 of 4 parts ((a), (b)) | 7 of 11 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=16c43531-bb62-4052-82d4-4c39368745df&question_id=4fab4c8c-1b1a-4a78-94c7-e7bc1797fc75&source_detail=WST01%2F01+October+2019) | | [**WST01/01** October 2019 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2019-october-wst01-01/#q-4) | **Q4** Correlation and Regression - Edexcel IAL Statistics S1 Oct 2019 Q4 | FRQ | 1 of 3 parts ((b)) | 1 of 6 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=16c43531-bb62-4052-82d4-4c39368745df&question_id=6414d94d-4628-42a0-b90d-a62ca56b9a99&source_detail=WST01%2F01+October+2019) | | [**WST01/01** June 2019 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2019-june-wst01-01/#q-6) | **Q6** Referrals and Distance Regression - Edexcel IAL S1 Jun 2019 Q6 | FRQ | 4 of 7 parts ((c), (d), (f), (g)) | 7 of 13 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=63157e68-d0d9-4b7d-a8fe-e9f4fd1f89fa&question_id=b79bb450-ab90-4205-8801-7152a29ec741&source_detail=WST01%2F01+June+2019) | | [**WST01/01** January 2019 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2019-january-wst01-01/#q-6) | **Q6** Correlation, Regression, and Outliers - Edexcel IAL S1 Jan 2019 Q6 | FRQ | 2 of 8 parts ((b), (f)) | 6 of 18 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=9835256d-c8ce-4694-88d4-4966e00f9af1&question_id=9610026b-2c72-4860-a4dc-74880b7a42b0&source_detail=WST01%2F01+January+2019) | | [**WST01/01** October 2018 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2018-october-wst01-01/#q-1) | **Q1** Correlation, Regression and Linear Modeling - Edexcel IAL S1 Oct 2018 Q1 | FRQ | 2 of 6 parts ((d), (e)) | 5 of 11 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=bccf8334-d3a5-4f52-a293-2b8bddeed272&question_id=a7677ae2-2e47-418f-aedf-097773f593a2&source_detail=WST01%2F01+October+2018) | | [**WST01/01** June 2018 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2018-june-wst01-01/#q-1) | **Q1** Coded Data and Linear Regression - Edexcel IAL S1 June 2018 Q1 | FRQ | 2 of 6 parts ((c), (d)) | 4 of 13 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=4623222d-7332-4dbd-9d37-2435c34c54b8&question_id=e4d2ad08-bf7c-4042-a0e2-a794c347b7f2&source_detail=WST01%2F01+June+2018) | | [**WST01/01** January 2018 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2018-january-wst01-01/#q-3) | **Q3** Correlation and Regression - Edexcel IAL S1 Jan 2018 Q3 | FRQ | 2 of 4 parts ((c), (d)) | 6 of 8 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e8304cdf-411e-4e4a-9d73-49a2fa428939&question_id=9521dd4d-3b4e-4127-8aa5-e4e175610e8d&source_detail=WST01%2F01+January+2018) | | [**WST01/01** January 2018 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2018-january-wst01-01/#q-5) | **Q5** Regression Coefficients and Linear Coding - Edexcel IAL S1 Jan 2018 Q5 | FRQ | 1 of 6 parts ((d)) | 3 of 12 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e8304cdf-411e-4e4a-9d73-49a2fa428939&question_id=ee601ed4-7106-412e-8d2e-7afe7da773b8&source_detail=WST01%2F01+January+2018) | | [**WST01/01** October 2017 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2017-october-wst01-01/#q-5) | **Q5** Linear regression and PMCC - Edexcel IAL S1 Oct 2017 Q5 | FRQ | 1 of 5 parts ((c)) | 5 of 13 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=46dbee62-0633-41cd-9df6-71e49b160803&question_id=18f57740-9a79-4764-8e23-7d8d1f60ab9d&source_detail=WST01%2F01+October+2017) | | [**WST01/01** June 2017 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2017-june-wst01-01/#q-5) | **Q5** Correlation and regression - Edexcel IAL S1 June 2017 Q5 | FRQ | 2 of 8 parts ((a), (e)) | 6 of 16 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=5f47d0cd-fbe6-4039-8dd6-f21014d4b490&question_id=44212a42-fcd9-46d9-abe5-06f6c5e09471&source_detail=WST01%2F01+June+2017) | | [**WST01/01** January 2017 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2017-january-wst01-01/#q-3) | **Q3** Correlation and Regression - Edexcel IAL S1 Jan 2017 Q3 | FRQ | 2 of 8 parts ((c), (e)) | 6 of 17 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=1a9f502e-3d00-4385-8f4c-18d60b758de8&question_id=afd9620e-aac4-4440-a890-ae4f9dd73d6e&source_detail=WST01%2F01+January+2017) | | [**WST01/01** October 2016 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2016-october-wst01-01/#q-4) | **Q4** Femur Length and Head Circumference - Edexcel IAL S1 Oct 2016 Q4 | FRQ | 3 of 6 parts ((a), (b), (e)) | 9 of 15 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=fbeee3bc-76de-434a-a554-f591184d5b69&question_id=25f639d8-8eda-4caa-bf49-ad8ffe1b6c63&source_detail=WST01%2F01+October+2016) | | [**WST01/01** June 2016 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2016-june-wst01-01/#q-1) | **Q1** Correlation and Regression on Sunflower Seeds - Edexcel IAL S1 June 2016 Q1 | FRQ | 2 of 5 parts ((d), (e)) | 6 of 12 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b4b356b9-e8c0-47d1-ad81-a1cb08b96a9f&question_id=2bfcb4fc-49e2-49f3-912b-a451e378ab90&source_detail=WST01%2F01+June+2016) | | [**WST01/01** January 2016 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2016-january-wst01-01/#q-3) | **Q3** Correlation and Regression - Edexcel IAL S1 Jan 2016 Q3 | FRQ | 2 of 6 parts ((d), (e)) | 7 of 15 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=195df171-04c9-4334-9631-0f01dce861b4&question_id=5ef981b5-f006-4513-b0af-9df7c8f3b448&source_detail=WST01%2F01+January+2016) | | [**WST01/01** June 2015 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2015-june-wst01-01/#q-2) | **Q2** Correlation and Regression - Edexcel IAL S1 June 2015 Q2 | FRQ | 2 of 6 parts ((a), (b)) | 6 of 13 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=589427ba-c1ca-4d7f-b977-5339870547b9&question_id=5a0d78e6-0ee6-44c5-8957-7d493b9d6549&source_detail=WST01%2F01+June+2015) | | [**WST01/01** June 2015 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2015-june-wst01-01/#q-7) | **Q7** Scatter Diagrams and Product Moment Correlation Coefficient - Edexcel IAL S1 June 2015 Q7 | FRQ | 1 of 4 parts ((a)) | 2 of 6 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=589427ba-c1ca-4d7f-b977-5339870547b9&question_id=92c52631-97d2-4d48-ad82-181d6cad554a&source_detail=WST01%2F01+June+2015) | | [**WST01/01** January 2015 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2015-january-wst01-01/#q-5) | **Q5** Regression and Normal Distribution - Edexcel IAL S1 Jan 2015 Q5 | FRQ | 2 of 7 parts ((d), (e)) | 2 of 13 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=675a8bc9-486a-4943-956c-2e59b4607250&question_id=10bcd88d-ff09-4ca1-b234-a2fe2ea20fe6&source_detail=WST01%2F01+January+2015) | | [**WST01/01** June 2014 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2014-june-wst01-01/#q-1) | **Q1** Age and Blood Volume Regression - Edexcel IAL Statistics S1 June 2014 Q1 | FRQ | 2 of 6 parts ((d), (e)) | 5 of 12 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=a4ec1570-2bfb-41e3-ba03-db14c1447091&question_id=faf2f638-7fea-4699-b387-5b40f231e47b&source_detail=WST01%2F01+June+2014) | | [**WST01/01** January 2014 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2014-january-wst01-01/#q-3) | **Q3** Linear Regression - Edexcel IAL S1 Jan 2014 Q3 | FRQ | 3 of 5 parts ((a), (b), (c)) | 7 of 11 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=6f1ef4b7-f8ed-4c79-b52e-f99a49ff6aa3&question_id=dda29f9a-2e46-42a5-b3f1-180e39377c3f&source_detail=WST01%2F01+January+2014) | ## Related topic questions in Correlation and 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 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 ## Topic question rules and edge cases **How many topic questions cover this syllabus point?** 39 question stems cover this subtopic across 36 papers, but only 82 tagged parts and 212 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-1-wst01/correlation-and-regression/4-1-scatter-diagrams-linear-regression/