A revision workbook covering the Statistical Enquiry Cycle (SEC) — the framework that underpins the entire AQA GCSE Statistics specification (8382) and appears as a multi-part question on every exam paper. Suitable for Foundation and Higher tier.

The five SEC stages covered:
Stage 1 — Initial Planning: writing a correct hypothesis, choosing data collection methods, identifying constraints
Stage 2 — Data Collection: questionnaire design rules, sampling methods, pilot studies, dealing with non-response
Stage 3 — Data Processing: data cleaning checklist, selecting the right statistical measure, choosing appropriate charts
Stage 4 — Interpretation: writing contextualised statistical comparisons, linking results to the hypothesis, discussing reliability
Stage 5 — Evaluation: identifying weaknesses, suggesting specific improvements, refining the investigation

Includes a complete full-length SEC exam question (phone use and sleep habits) covering all five stages with a detailed mark scheme. Common mistake boxes highlight the most frequently lost marks in SEC questions, including the rule that “collect more data” alone scores zero.
Suitable for classroom use, independent revision, and tutoring. Compatible with the 2019–onwards specification.