Mathematics 9709 · AS & A Level · Representation of data
Representation of data — practice question
A particular musical passage was performed by 91 pianists, and the number of incorrect notes for each pianist was recorded. The results are shown in the table.
(a)[5]
Draw a histogram to display this information.
(b)[2]
State which class interval contains the lower quartile and which class interval contains the upper quartile. Hence find the greatest possible value of the interquartile range.
(c)[3]
Calculate an estimate for the mean number of incorrect notes.
Worked solution & mark scheme
This 10-mark question has a full step-by-step worked solution and mark scheme. One marking point: “At least three correct class widths applied” …