Mathematics 9709 · AS & A Level · Representation of data
Representation of data — practice question
The back-to-back stem-and-leaf diagram gives the diameters, in cm, of 19 cylindrical pipes made by each of the two companies, A and B. Key: $1\,|\,35\,|\,3$ shows that the pipe diameter from company A is $0.351\text{ cm}$ and from company B is $0.353\text{ cm}$.
(a)[3]
Determine the median and interquartile range of the pipes made by company $A$.
(b)[3]
Construct box-and-whisker plots for companies $A$ and $B$ on the grid below.
(c)[1]
Give one comparison between the diameters of pipes produced by companies $A$ and $B$.
Worked solution & mark scheme
This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Median correctly identified as $0.355$” …