Mathematics 9709 · AS & A Level · Representation of data
Representation of data — practice question
On one particular day, the heights of $150$ sunflower plants, which were grown by children at a nearby school, are recorded to the nearest cm. The results are then arranged in the table below.
(a)[4]
Draw a cumulative frequency graph to show the data.
(b)[2]
Use your graph to estimate the $30$th percentile for the heights of the sunflower plants.
(c)[5]
Calculate estimates of the mean and the standard deviation for the heights of the $150$ sunflower plants.
Worked solution & mark scheme
This 11-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Accurate cumulative frequencies $28,60,102,130,144,150$” …