Topic guides
GCSE Statistics, topic by topic.
73 free guides covering Collecting Data, Processing and Representing Data, Summarising Data, Correlation and Time Series, Probability and Index Numbers - each with a plain-English explanation, a worked example, practice questions and exam-style questions with full mark schemes. Every guide links to a free printable worksheet, no card or account needed.
Collecting Data
Data Cleaning and Outliers (Foundation)Foundation tierEstimating from Samples (Foundation)Foundation tierStratified Sampling (Foundation)Foundation tierPilot Surveys (Foundation)Foundation tierStratified Sampling (Higher)Higher tierCapture RecaptureHigher tierEstimating from Samples (Higher)Higher tierPilot Surveys (Higher)Higher tierThe Statistical Enquiry CycleFoundation & HigherTypes of DataFoundation & HigherSampling MethodsFoundation & HigherCollecting DataFoundation & HigherDesigning Questionnaires and SurveysFoundation & HigherExperimental DesignFoundation & Higher
Processing and Representing Data
Spreadsheets and ICT (Foundation)Foundation tierRecognising Misleading Graphs (Foundation)Foundation tierData Cleaning and Outliers (Higher)Higher tierSpreadsheets and ICT (Higher)Higher tierHistograms and Frequency DensityHigher tierComparative and Proportional Pie ChartsHigher tierBox Plots from Cumulative Frequency and OutliersHigher tierRecognising Misleading Graphs (Higher)Higher tierFrequency Tables and Tally ChartsFoundation & HigherGrouped Frequency TablesFoundation & HigherPictogramsFoundation & HigherBar and Composite Bar ChartsFoundation & HigherPie ChartsFoundation & HigherStem and Leaf DiagramsFoundation & HigherHistogramsFoundation & HigherFrequency PolygonsFoundation & HigherCumulative FrequencyFoundation & HigherBox PlotsFoundation & HigherPopulation PyramidsFoundation & HigherChoropleth MapsFoundation & Higher
Summarising Data
Skewness by InspectionFoundation tierPercentilesFoundation tierStandard DeviationHigher tierStandardised ScoresHigher tierQuality Assurance and Control ChartsHigher tierPercentiles and Interpercentile RangeHigher tierSkewnessHigher tierWeighted and Geometric MeanHigher tierMean Median Mode and RangeFoundation & HigherAverages from a Frequency TableFoundation & HigherEstimated Mean from Grouped DataFoundation & HigherComparing Data SetsFoundation & HigherCombined MeanFoundation & HigherMedian Quartiles and IQRFoundation & Higher
Correlation and Time Series
Correlation and Causation (Foundation)Foundation tierSpearman's Rank InterpretationFoundation tierCorrelation and Causation (Higher)Higher tierSpearman's Rank CorrelationHigher tierRegression and the PMCCHigher tierTime Series and Moving AveragesFoundation & HigherScatter Graphs and Line of Best FitFoundation & HigherTime SeriesFoundation & Higher
Probability
Risk (Foundation)Foundation tierConditional Probability (Foundation)Foundation tierRisk (Higher)Higher tierConditional Probability (Higher)Higher tierThe General Addition LawHigher tierProbability Basics and the Probability ScaleFoundation & HigherMutually Exclusive EventsFoundation & HigherSample Space DiagramsFoundation & HigherRelative and Expected FrequencyFoundation & HigherVenn DiagramsFoundation & HigherTree DiagramsFoundation & Higher
Index Numbers
Probability Distributions
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