(a)[2]
Estimate the interquartile range of the data from the graph.
(b)[2]
35% of the children needed more than $T$ seconds to finish the puzzle. Use the graph to estimate $T$.
Mathematics 9709 · AS & A Level · Representation of data
Representation of data — practice question
The cumulative frequency graph shows how long 120 children took to finish a specific puzzle.
Worked solution & mark scheme
This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Reads the interquartile range from the graph, $\text{IQR}=31-23.7$.” …
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