Statistics

• An Overview — the statistical cycle, types of data, key formulae and common mistakes

The 6 National Curriculum subtopics

• S1 · Sampling and Populations — random and stratified sampling, bias and the limitations of samples
• S2 · Tables, Charts and Diagrams — bar charts, pie charts, pictograms and time series
• S3 · Histograms and Cumulative Frequency — grouped data, frequency density and reading off a curve
• S4 · Averages, Spread and Box Plots — mean, median, mode, quartiles, outliers and comparing distributions
• S5 · Using Statistics to Describe a Population — valid conclusions, misleading claims and questionnaire design
• S6 · Scatter Graphs and Correlation — lines of best fit, interpolation, extrapolation and causation

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Each page contains step-by-step explanations, several worked examples and ten practice questions with fully worked solutions. All pages are self-contained HTML files that can be downloaded and used offline.