# Topic Questions: 6.1 The Normal distribution including the mean, variance and use of tables of the cumulative distribution function. — WST01 Probability > 1 WST01 Probability topic questions (4 marks) on 6.1 The Normal distribution including the mean… — 1 papers, 2023. Open the exact question in the original… - Canonical HTML: https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/probability/6-1-the-normal-distribution-including-the-mean-variance-and-use-of-tables-of-the/ - Markdown mirror: https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/probability/6-1-the-normal-distribution-including-the-mean-variance-and-use-of-tables-of-the/index.md --- Edexcel IAL · Mathematics · WST01 · Probability 1 WST01 Probability topic questions are tagged to this syllabus point across 1 papers (2023). Only the parts whose knowledge graph matches this syllabus statement are counted, and the table shows which parts of each question are involved. - 1 topic questions - 1 papers - 4 tagged marks - 0.3% of topic questions - 0.5% of topic marks - 2023 - Syllabus 2014–current - [All WST01 Probability topic questions](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/probability/) - [All paper codes](https://www.examsci.com/topics/) Core finding **This Probability syllabus point appears in 1 WST01 papers across 2023, contributing 1 topic questions and 4 marks.** The most recent appearance is WST01/01 January 2023. That equals 0.3% of the 291 topic questions and 0.5% of the 749 marks tagged to Probability. 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 2023 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/mathematics/statistics-1-wst01/2023-january-wst01-01/#q-5) | **Q5** Normal Distribution and Outliers in Wing Lengths - Edexcel IAL S1 January 2023 Q5 | FRQ | 1 of 6 parts ((e)) | 4 of 17 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e737c446-6240-468d-9e31-1cba09717d09&question_id=b2fa55e7-a214-4128-928b-ab0654a3658c&source_detail=WST01%2F01+January+2023) | ## Related topic questions in Probability - [3.1 Elementary probability.](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/probability/3-1-elementary-probability/) — 82 question items · 35 papers — 188 marks · 2014–2026 - [3.2 Sample space. Exclusive and complementary events. Conditional probability.](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/probability/3-2-sample-space-exclusive-and-complementary-events-conditional-probability/) — 196 question items · 36 papers — 531 marks · 2014–2026 - [3.3 Independence of two events.](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/probability/3-3-independence-of-two-events/) — 40 question items · 28 papers — 113 marks · 2014–2026 - [3.4 Sum and product laws.](https://www.examsci.com/topics/edexcel-ial/mathematics/statistics-1-wst01/probability/3-4-sum-and-product-laws/) — 118 question items · 35 papers — 324 marks · 2014–2026 ## Topic question rules and edge cases **How many topic questions cover this syllabus point?** 1 question stems cover this subtopic across 1 papers, but only 1 tagged parts and 4 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 2023. 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/probability/6-1-the-normal-distribution-including-the-mean-variance-and-use-of-tables-of-the/