IGCSE 0580 Statistics

Statistics Visual Questions

Interactive practice with histograms, cumulative frequency curves, scatter diagrams and pie charts. Hover over chart elements to read values, then answer the question. Box plots are not on the current 0580 syllabus (removed from 2025); any box plot questions in the practice below are extra reading practice only.

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Question 1 of 10

Scatter Diagram

Scatter Diagram — Outlier

Hover or tap on chart elements for values

Which point is most likely an outlier? Identify its approximate coordinates.

IGCSE Statistics Exam Tips

Cumulative frequency — always plot at upper boundaries

The cumulative frequency is the running total up to the end of each class. Always plot points at the upper class boundary, not the midpoint. Start your curve at (lower boundary, 0).

Finding the median from a cumulative frequency curve

Total frequency ÷ 2 gives the median position. Draw a horizontal line from this value to the curve, then read down to the x-axis. For Q1 use n/4, for Q3 use 3n/4.

Quartiles and the interquartile range

Read the lower quartile (Q1) and upper quartile (Q3) from a cumulative frequency curve. The IQR = Q3 − Q1. The range = max − min. Box plots are not on the current 0580 syllabus (removed from 2025), so you do not need to draw them.

Describing scatter diagrams

Use the correct language: positive correlation (both increase), negative correlation (one increases, other decreases), no correlation (no pattern). Always mention the strength: strong, moderate, or weak.

Pie chart angles must total 360°

To find the angle for a category: (frequency ÷ total frequency) × 360°. To find frequency from an angle: (angle ÷ 360°) × total frequency. Always check your angles sum to 360°.

Also useful

Formula Sheet

All key formulas including statistics formulas.

Past Papers

Practise statistics questions from real past papers.

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