Mathematics 0580 · IGCSE · Cumulative frequency diagrams
Cumulative frequency diagrams — practice question
The time, $t$ minutes, taken by each of the $80$ students to finish their homework is recorded. The cumulative frequency diagram displays the outcomes. The axes are labelled Time (minutes) on the horizontal axis and Cumulative frequency on the vertical axis.
(a)[1]
Use the cumulative frequency diagram to estimate the median.
(b)[2]
Use the cumulative frequency diagram to estimate the interquartile range.
(c)[2]
Use the cumulative frequency diagram to estimate the number of students who spend more than $40$ minutes completing their homework.
Worked solution & mark scheme
This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “$25$” …