2025 IGCSE 0580 May/June P21 Q12

2025 IGCSE 0580 May/June P21 Q12

4 marks

The time spent on the internet by each of \(120\) adults is recorded for one day.

The cumulative frequency diagram shows this information.

  1. Use the cumulative frequency diagram to find an estimate of the interquartile range.[2]
  2. \(70\%\) of the adults spent less than \(k\) hours on the internet.
    Use the cumulative frequency diagram to find an estimate of the value of \(k\).[2]

Solution:

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Answer:(a) Approximately \(1.4\text{ h}\). (b) \(k\approx5.4\).

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