IGCSE›Cambridge IGCSE Maths›Mind mapsStatistical DiagramsCambridge IGCSE Maths: Mind mapStudy pack PDFAlso for this subtopic:Revision notesFlashcardsSubtopic testCover factsTabulatingTally tables group marks in fivesTotals go in a frequency columnTwo-way tables classify by two variablesChart typesBar chart: compare category frequenciesComposite bar: totals made of sub-categoriesDual bar: compare two data setsPie chart: proportions of a wholePictogram: symbols with a keyBar chart rulesEqual-width bars with gapsEvery diagram needs a title and keyUse a consistent scaleDiagramsstatistical diagramsStem and leafStem is all digits except the lastLeaf is the last digitOrder each row smallest to largestInclude a key: 3 | 4 means 34Comparing dataCompare an average for typical sizeCompare a spread for consistencyWrite both in contextExam tipsMissing key or unordered leaves lose marksOne comparison alone rarely earns full marksSmall or biased samples limit conclusions