Mathematics 4024 · O Level · Cumulative frequency diagrams
Cumulative frequency diagrams — practice question
The masses of $200$ beetles were recorded. The findings are shown in a cumulative frequency table, and a section of the cumulative frequency curve has been drawn.
(a)[1]
Complete the cumulative frequency curve.
(b(i))[1]
Use the curve to find an estimate for the median.
(b(ii))[1]
Use the curve to find an estimate for the lower quartile.
(b(iii))[2]
Use the curve to find the number of beetles that have a mass greater than $1.85$ grams.
Worked solution & mark scheme
This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Correct completion of the curve” …