Mathematics 0580 · IGCSE · Cumulative frequency diagrams

Cumulative frequency diagrams — practice question

The time for each of 200 students to finish a calculation is recorded, and the outcomes are displayed on a cumulative frequency diagram.
(a)[2]

Use the diagram to estimate the interquartile range.

(b)[2]

Use the diagram to find how many students took more than 40 seconds to finish the calculation.

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