Edexcel IAL · Mathematics · WST03 · Estimation, confidence intervals and tests
Topic Questions: 3.8 Use of large sample results to extend to the case in which the population variances are unknown. — WST03 Estimation, confidence intervals and tests
34 WST03 Estimation, confidence intervals and tests topic questions are tagged to this syllabus point across 19 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.
Core finding
This Estimation, confidence intervals and tests syllabus point appears in 19 WST03 papers across 2014–2026, contributing 34 topic questions and 157 marks. The most recent appearance is WST03/01 January 2026. That equals 18.8% of the 181 topic questions and 26.7% of the 587 marks tagged to Estimation, confidence intervals and tests. 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 |
|---|---|---|---|---|---|---|
| WST03/01January 2026 · Edexcel IAL | Q5 Two-sample Hypothesis Test for Means - Jan 2026 Q5 |
FRQ | 2 of 3 parts ((b), (c)) | 9 of 12 on the paper |
Easy | Go to Practice Hub |
| WST03/02January 2026 · Edexcel IAL | Q6 Stratified Sampling and Hypothesis Testing for Difference of Means - Edexcel IAL Statistics S3 Jan 2026 Q6 |
FRQ | 2 of 7 parts ((c), (e)) | 8 of 17 on the paper |
Easy | Go to Practice Hub |
| WST03/01June 2025 · Edexcel IAL | Q4 Two-Sample Hypothesis Test for Means - Edexcel IAL S3 2025 Jun Q4 |
FRQ | 2 of 3 parts ((b), (c)) | 8 of 11 on the paper |
Easy | Go to Practice Hub |
| WST03/01January 2025 · Edexcel IAL | Q3 Difference of Two Means Hypothesis Test - Edexcel IAL Statistics S3 Jan 2025 Q3 |
FRQ | 1 of 3 parts ((b)) | 7 of 12 on the paper |
Medium | Go to Practice Hub |
| WST03/01June 2024 · Edexcel IAL | Q5 Two-Sample Hypothesis Test for Means - Edexcel IAL Statistics S3 2024 Jun Q5 |
FRQ | 1 of 3 parts ((a)) | 8 of 14 on the paper |
Medium | Go to Practice Hub |
| WST03/01January 2024 · Edexcel IAL | Q5 Two-Sample Mean Hypothesis Test - Edexcel IAL Statistics S3 January 2024 Q5 |
FRQ | 2 parts ((a), (b)) | 9 | Medium | Go to Practice Hub |
| WST03/01June 2023 · Edexcel IAL | Q6 Two-Sample Hypothesis Test for Means - Edexcel IAL Statistics S3 2023 Jun Q6 |
FRQ | 2 of 4 parts ((b), (d)) | 8 of 13 on the paper |
Medium | Go to Practice Hub |
| WST03/01January 2023 · Edexcel IAL | Q5 Two-Sample Hypothesis Test for Means - Edexcel IAL S3 Jan 2023 Q5 |
FRQ | 2 parts ((a), (b)) | 10 | Medium | Go to Practice Hub |
| WST03/01June 2022 · Edexcel IAL | Q2 Estimation, Confidence Intervals and Tests - Edexcel IAL Statistics S3 2022 Jun Q2 |
FRQ | 2 of 3 parts ((b), (c)) | 8 of 11 on the paper |
Easy | Go to Practice Hub |
| WST03/01January 2022 · Edexcel IAL | Q2 Hypothesis Test for Difference Between Two Means - Edexcel IAL S3 Jan 2022 Q2 |
FRQ | 1 of 2 parts ((a)) | 7 of 8 on the paper |
Medium | Go to Practice Hub |
| WST03/02January 2022 · Edexcel IAL | Q5 Difference of Means and CLT - Edexcel IAL Statistics S3 Jan 2022 Q5 |
FRQ | 4 of 5 parts ((a)(i), (a)(ii), (b), (d)) | 13 of 15 on the paper |
Easy | Go to Practice Hub |
| WST03/01October 2021 · Edexcel IAL | Q6 Two-Sample Hypothesis Test for Means - Edexcel IAL Statistics S3 Oct 2021 Q6 |
FRQ | 2 of 4 parts ((b), (d)) | 8 of 12 on the paper |
Easy | Go to Practice Hub |
| WST03/01June 2021 · Edexcel IAL | Q4 Sampling and Hypothesis Testing for Two Means - Edexcel IAL Statistics 3 June 2021 Q4 |
FRQ | 2 of 6 parts ((b), (d)) | 8 of 16 on the paper |
Easy | Go to Practice Hub |
| WST03/01October 2020 · Edexcel IAL | Q5 Difference of Means Hypothesis Testing - Edexcel IAL Statistics S3 June 2020 Q5 |
FRQ | 2 of 3 parts ((a), (b)) | 10 of 12 on the paper |
Medium | Go to Practice Hub |
| WST03/01June 2019 · Edexcel IAL | Q6 Hypothesis Testing - Edexcel IAL Statistics S3 June 2019 Q6 |
FRQ | 1 of 4 parts ((b)) | 7 of 14 on the paper |
Medium | Go to Practice Hub |
| WST03/01June 2017 · Edexcel IAL | Q5 Stratified Sampling and Two-Sample Mean Test - Edexcel IAL Statistics S3 2017 Jun Q5 |
FRQ | 1 of 3 parts ((c)) | 7 of 11 on the paper |
Easy | Go to Practice Hub |
| WST03/01June 2016 · Edexcel IAL | Q4 Hypothesis Testing on Two Means - Edexcel IAL S3 June 2016 Q4 |
FRQ | 2 of 3 parts ((a), (c)) | 7 of 8 on the paper |
Easy | Go to Practice Hub |
| WST03/01June 2015 · Edexcel IAL | Q6 Hypothesis Testing - Difference of Means - Edexcel IAL S3 2015 Jun Q6 |
FRQ | 2 of 4 parts ((b), (d)) | 8 of 13 on the paper |
Easy | Go to Practice Hub |
| WST03/01June 2014 · Edexcel IAL | Q3 Hypothesis Testing for Two Means - Edexcel IAL S3 June 2014 Q3 |
FRQ | 1 part | 7 | Medium | Go to Practice Hub |
Related topic questions in Estimation, confidence intervals and tests
3.1 Concepts of standard error, estimator, bias.
149 marks · 2014–2026
3.2 The distribution of the sample mean .
88 marks · 2014–2026
3.3 Concept of a confidence interval and its interpretation.
75 marks · 2015–2026
3.4 Confidence limits for a Normal mean, with variance known.
123 marks · 2015–2026
3.5 Hypothesis tests for the mean of a Normal distribution with variance known.
27 marks · 2016–2024
3.6 Use of Central Limit theorem to extend hypothesis tests and confidence intervals to samples from non-Normal distributions. Use of large sample results to extend to the case in which the variance is unknown.
96 marks · 2015–2026
Topic question rules and edge cases
- How many topic questions cover this syllabus point?
- 19 question stems cover this subtopic across 19 papers, but only 34 tagged parts and 157 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.