GCSE›AQA GCSE Maths›Mind mapsCollecting and Representing DataAQA GCSE Maths: Mind mapStudy pack PDFAlso for this subtopic:Revision notesFlashcardsSubtopic testCover factsTypes of dataPrimary: collected first-hand by youSecondary: collected by someone elseDiscrete: separate values, e.g. siblingsContinuous: any value in a range, e.g. timeChoosing a diagramMatch the chart to the type of dataFrequency table: a first step for any dataBe ready to justify your choiceDatacollecting and chartsCategorical dataBar chart: categories, with gapsPie chart: proportions of a wholePictogram: symbols with a keyNumerical dataVertical line chart: ungrouped discrete dataLine graph for time seriesTime series: data at successive timesExam tipsBar chart for continuous data is a common errorCategorical bars have gaps; continuous usually noneSay why the diagram suits the data