Mathematics 9709 · AS & A Level · Representation of data
Representation of data — practice question
The times taken, $t$ minutes, to finish a walking challenge by $250$ club members are shown in the table.
(a)[2]
Produce a cumulative frequency graph to represent the data.
(b)[1]
Use your graph to estimate the $60$th percentile of the data.
(c)[4]
Calculate an estimate of the standard deviation for the times taken to complete the challenge by these 250 members.
Worked solution & mark scheme
This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “At least 3 correctly plotted cumulative frequency points” …