GCSE Statistics (AQA)

28 free revision lessons in 5 units. Open the course or go straight to a lesson.

Planning & Designing a Statistical Enquiry

From hypothesis to sampling plan — designing data collection that produces trustworthy answers.

1. Hypotheses, Questions and Investigation Constraints
2. Types of Data and Variables
3. Primary and Secondary Data Sources
4. Sampling Methods and Stratification
5. Questionnaires, Pilot Studies and Cleaning Data

Representing & Processing Data

Reading and drawing charts, histograms, stem and leaf, box plots and cumulative frequency curves.

1. Tally Charts, Tabulation and Pictograms
2. Bar Charts, Pie Charts and Stem-and-Leaf Diagrams
3. Frequency Polygons, Time Series and Line Charts
4. Histograms and Frequency Density
5. Cumulative Frequency and Box Plots
6. Scatter Diagrams, Population Pyramids and Choropleth Maps

Numerical Measures: Averages, Spread & Correlation

Drilling means, medians, quartiles, spread and correlation calculations for grouped and ungrouped data.

1. Mode, Median and Mean for Ungrouped Data
2. Averages from Frequency Tables and Grouped Data
3. Weighted Mean and Geometric Mean
4. Range, Quartiles and Interquartile Range
5. Standard Deviation and Interpercentile Range
6. Scatter Diagrams, Line of Best Fit and Regression
7. Spearman's Rank Correlation Coefficient

Probability & Comparing Distributions

Calculating probabilities, comparing data sets and modelling with the Normal and binomial distributions.

1. Probability Scale, Expected Frequency and Estimating from Data
2. Relative Risk, Absolute Risk and Risk Communication
3. Two-Way Tables, Tree Diagrams and Venn Diagrams
4. Comparing Data Sets in Context
5. Normal Distribution and Standardising Data
6. Quality Control Charts, Population Estimates and Capture-Recapture

Interpreting Results & The Statistical Enquiry Cycle

Reading correlation, judging conclusions, and walking through the full Statistical Enquiry Cycle from question to review.

1. Correlation, Causation and the Vocabulary of Association
2. Reading Skew, Outliers and Distributions
3. Time Series, Trends and Rates of Change
4. The Statistical Enquiry Cycle: Reviewing the Whole Investigation

How to revise Statistics

• Retrieval Practice
• Spaced Repetition
• Dual Coding
• Elaborative Interrogation
• Interleaving
• Knowledge Organisers
• Timed Practice

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