AQA GCSE Statistics (8382): complete guide to the statistical enquiry cycle, the topics and the exams

AQA GCSE Statistics (specification 8382) is a linear course assessed by two written papers at the end of the course. There is no coursework, although a statistical enquiry is completed as part of learning. This page is the index: below is a map of the seven content areas, the statistical enquiry cycle that ties them together, the exam structure, and how to study each topic.

The statistical enquiry cycle

The whole course is framed by the statistical enquiry cycle, which AQA expects you to know and apply.

1. Plan. Frame a question or hypothesis and decide what data to collect.
2. Collect. Gather data using a suitable method and sample.
3. Process and represent. Calculate summaries and draw appropriate diagrams.
4. Interpret and discuss. Read the results and answer the original question.
5. Evaluate. Judge how well the enquiry worked and feed that back into a better plan.

The seven content areas

The specification breaks into seven areas, each with dot-point answer pages, an overview guide and a quiz.

The collection of data

Types of data, populations and samples, sampling methods (random, systematic, stratified), questionnaires and surveys, experiments, and sources of bias.

Processing and representing data

Tables, pie charts, bar charts and pictograms, stem and leaf diagrams, histograms with frequency density, cumulative frequency, and box plots.

Summarising data

The mean, median and mode, the estimated mean from grouped data, the range, interquartile range and percentiles, standard deviation, and comparing distributions.

Scatter diagrams and correlation

Plotting bivariate data, describing correlation, correlation versus causation, lines of best fit and prediction, and Spearman's rank correlation coefficient.

Time series

Time series graphs and types of variation, moving averages, centred moving averages, trend lines, and forecasting with the seasonal effect.

Probability

The probability scale, the addition and multiplication rules, tree and Venn diagrams, conditional probability, and probability distributions including the binomial.

The normal distribution and index numbers

The normal distribution and the 68, 95, 99.7 rule, standardised scores, simple and weighted index numbers, and the RPI and CPI.

Exam structure

AQA GCSE Statistics is assessed by two written papers, both sat at the end of the course. A calculator is allowed in both.

• Paper 1. 1 hour 30 minutes, 80 marks, 50%.
• Paper 2. 1 hour 30 minutes, 80 marks, 50%.

Both papers may assess content from anywhere in the specification, so you cannot revise paper by paper. Each rewards accurate calculation followed by a clear interpretation in context.

Foundation and Higher tiers

The qualification is tiered, and you sit both papers at one tier.

• Foundation tier targets grades 1 to 5 and covers the core techniques across all seven areas.
• Higher tier targets grades 4 to 9 and adds harder material such as standard deviation, Spearman's rank, histograms with unequal class widths, and weighted and chain base index numbers.

How to study AQA Statistics

Statistics rewards careful calculation and, above all, interpretation in context.

1. Work from the specification statements. Each numbered point is a checklist; questions are written from them.
2. Pair every calculation with an interpretation. Most marks come from explaining what a figure means in context, not just finding it.
3. Learn the key formulae. Estimated mean, standard deviation, Spearman's rank, standardised scores and index numbers all recur.
4. Master comparing distributions. Always compare one average and one measure of spread, in context.
5. Practise with the calculator. Both papers allow one, so drill efficient, accurate calculator use and still show full working.

The seven areas, topic by topic

Each area has specification-statement-level answer pages with worked exam questions and cross-links, plus an overview guide and quiz. Start with the area overviews: the collection of data overview, the processing and representing data overview, the summarising data overview, the scatter diagrams and correlation overview, the time series overview, the probability overview and the normal distribution and index numbers overview.

For the official specification

AQA publishes the full specification (8382), past papers and mark schemes at aqa.org.uk. Always revise from the current specification and AQA's own past papers, because question style is board-specific.