(a)[2]
Construct a cumulative frequency graph to show the data.
(b)[3]
Use your graph to estimate the median and the interquartile range for the data.
(c)[3]
Calculate an estimate of the mean time taken by the 200 pupils to walk to school.
Mathematics 9709 · AS & A Level · Representation of data
Representation of data — practice question
The walking time to school, measured in minutes, was noted for 200 pupils at one school. The results are shown in the table below.
Worked solution & mark scheme
This 8-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Plots at least 4 accurate cumulative frequency points using suitable scales” …
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