Misleading diagrams (Edexcel GCSE Statistics): Flashcards
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Practise the cards
10 cards from this deck
If bar heights 75 and 85, axis starts at 70; actual diff?
If bar heights 75 and 85, axis starts at 70; actual diff?
Actual difference is 10 units
Bar chart vertical axis starts at 20. Why risky?
Bar chart vertical axis starts at 20. Why risky?
Small differences look larger; misleading
3D bar chart shows equal values; what to check?
3D bar chart shows equal values; what to check?
Perspective makes heights look unequal
Axes unlabeled on graph. What must you request?
Axes unlabeled on graph. What must you request?
Ask for variable names and units first
3D pie chart back slice looks small; how verify?
3D pie chart back slice looks small; how verify?
Check actual percentages or data labels
List steps to spot misleading diagrams (4 steps)
List steps to spot misleading diagrams (4 steps)
Check zero scale, labels, intervals, 3D effects
Scale 70-90: bars at 75 and 90 - how misleading?
Scale 70-90: bars at 75 and 90 - how misleading?
Exaggerated; real difference 15, scale omits zero.
Graph shows 30 on y-axis unlabeled. What's wrong?
Graph shows 30 on y-axis unlabeled. What's wrong?
No units; value is ambiguous, can't be compared.
3D pie: equal slices look unequal. How fix?
3D pie: equal slices look unequal. How fix?
Use 2D pie or list percentages to show true sizes.
Bar chart y-axis 70–90 with bars 75 and 90: what's wrong?
Bar chart y-axis 70–90 with bars 75 and 90: what's wrong?
YAxis starts at 70 not 0, exaggerates differences; start at 0.