Mathematics 4024 · O Level · Cumulative frequency diagrams

Cumulative frequency diagrams — practice question

The cumulative-frequency graph contains data on the reaction times of $60$ people.

(a)[1]

Estimate the lower quartile from the graph.

(b)[1]

Estimate, from the graph, the number of people whose reaction time is more than $0.2$ seconds.

Worked solution & mark scheme

This 2-mark question has a full step-by-step worked solution and mark scheme. One marking point: “$0.155$” …