GCSE Geography: Graph and Statistics Skills

Every GCSE Geography paper includes questions that test data skills, and the DfE subject content lists graphical, numerical and statistical skills alongside the topics themselves. This material trains those skills with small, realistic geographical data sets written into each question, so you practise the calculation and the interpretation together.

The statistical questions cover the measures of central tendency and spread named in board specifications such as AQA 8035: mean, median, mode, modal class, range, quartiles and the interquartile range. You work out quartiles as the middle values of each half of an ordered data set and learn why the interquartile range is often a better measure of spread than the range, because it ignores extreme values. Numerical questions practise percentage increase and decrease (always dividing by the original value), ratios in their simplest form and proportions of a whole, the calculations behind pie charts.

The graphical questions ask you to choose the right way to present data: pie charts and divided bar charts for parts of a whole, line graphs for change over time, scattergraphs for relationships between two variables, choropleth maps for data by area, isoline maps for continuous data such as pressure, population pyramids for age–sex structure, and climate graphs with rainfall bars and a temperature line. You interpret described scattergraphs, identifying positive and negative correlation and spotting an anomaly, and you consider the limitations of choropleth maps and the tricks of selective presentation, such as truncated axes and small samples.

The material offers a quiz with worked explanations, a set of flashcards for the formulas and definitions, and a printable written sheet of eight tasks with the data included: averages and range of pebble lengths, quartiles and interquartile range, percentage change in employment, pie-chart angles, choosing graphs, describing a relationship, criticising a misleading graph, and modal class and median class from grouped data.

These skills are also the ones you will use to present and analyse your own fieldwork data, so the material pairs well with fieldwork enquiry practice.

• Calculate mean, median, mode, range, quartiles and interquartile range
• Calculate percentage increase and decrease from the original value
• Simplify ratios and convert proportions into pie-chart angles
• Choose an appropriate graph or map for a given data set
• Describe correlation on a scattergraph and identify anomalies
• Recognise misleading presentation of statistics

Practice material written by Zestly, based on the geographical skills (graphical, numerical and statistical) in the DfE GCSE geography subject content and board specifications such as AQA GCSE Geography 8035, sections 3.4.2 to 3.4.4.