CCEA GCSE Statistics (2260): complete guide to the statistical enquiry cycle, collecting and representing data, averages and spread, correlation, time series, probability and the normal distribution

CCEA GCSE Statistics (specification 2260) is the Northern Ireland GCSE in statistics, set by the Council for the Curriculum, Examinations and Assessment. It develops the statistical enquiry cycle across three knowledge domains: collecting data, processing and representing and analysing data, and probability. This page is the index: below is a map of the units, the tier structure, the assessment, and how to study each area, with a direct link to every dot point.

The two units and the assessment

The qualification is assessed by two externally examined units.

• Unit 1 is a written paper of 1 hour 30 minutes, worth 80 marks and 50% of the qualification.
• Unit 2 is a written paper of 1 hour 30 minutes, worth 80 marks and 50%, and includes questions based on a pre-release case study focusing on Northern Ireland data.

The course is unitised, so part of the assessment can be taken at the end of the first year of study, and it is tiered into Foundation and Higher.

The three knowledge domains

The specification develops three domains, all through the statistical enquiry cycle.

Collecting data

The statistical enquiry cycle, planning an investigation, populations and samples, sampling methods, types of data, primary and secondary data, and questionnaire and data-collection-sheet design.

Processing, representing and analysing data

Tables and charts, stem-and-leaf diagrams, histograms and cumulative frequency, the mean, median, mode and weighted mean, the range, quartiles, interquartile range and standard deviation, standardised scores, scatter diagrams and correlation including Spearman's rank, time series and moving averages, and index numbers including the RPI and CPI.

Probability

Theoretical and experimental probability, relative frequency, the addition and multiplication laws, tree and Venn diagrams, expected frequency, and (at Higher tier) the normal distribution.

Foundation and Higher tiers

The qualification is tiered. Foundation candidates meet the enquiry cycle, sampling, data representation, averages and basic spread, scatter diagrams, time series, index numbers and probability. Higher tier adds the more demanding techniques: histograms with unequal class widths using frequency density, the standard deviation, standardised scores, Spearman's rank correlation coefficient, the normal distribution and the 68 to 95 to 99.7 rule, and quality assurance using control charts.

Assessment objectives

The same assessment objectives apply across the qualification: using and applying statistical techniques, reasoning and interpreting statistical information in context, and assessing the appropriateness of statistical methods and the conclusions drawn through the enquiry cycle. A substantial share of the marks rewards interpretation and evaluation in context, not just calculation, so clear method and worded conclusions matter in every answer.

How to study CCEA Statistics

Statistics rewards accurate calculation, clear working and interpretation in context.

1. Work through the enquiry cycle. Plan, collect, process and interpret is the framework behind every question, including the Unit 2 case study.
2. Drill the high-frequency calculations. Stratified sampling, the grouped mean, standard deviation, Spearman's rank, moving averages, index numbers and tree diagrams recur every year.
3. Show full working. Method marks are secure even when an answer slips, so set out every step.
4. Interpret in context. The reasoning marks go to candidates who say what a figure means for the question and evaluate reliability.
5. Prepare the case study and sit past papers. Study the Unit 2 pre-release material thoroughly and finish with full timed CCEA papers for your tier.

Syllabus, dot point by dot point

Each area has specification-level answer pages with worked CCEA-style questions and cross-links, plus an overview guide and quiz. Browse the full set at /ccea-gcse/statistics/syllabus.

The statistical enquiry cycle

• The statistical enquiry cycle

Collecting data

• Sampling methods
• Collecting data and questionnaires

Processing and representing data

• Charts and diagrams
• Histograms and cumulative frequency

Averages and measures of spread

• Measures of central tendency
• Measures of spread
• Standardised scores and skewness

Scatter diagrams and correlation

• Scatter diagrams and correlation

Time series and index numbers

• Time series and moving averages
• Index numbers

Probability

• Probability

The normal distribution

• The normal distribution

Quality assurance

• Quality assurance and control charts

For the official specification

CCEA publishes the full specification (2260), past papers and mark schemes at ccea.org.uk. Always revise from the current specification and CCEA's own past papers, because question style is board-specific.