40 students enter for a game of shot-put competition. The distance thrown (in metres) is recorded below :
Use a graph paper to draw an ogive for the above distribution.
Use a scale of $2\mathrm{cm}=1\mathrm{m}$ on one axis and 2 $\mathrm{cm}=5$ students on the other axis.
Hence using your graph find:
(i) the median
(ii) Upper Quartile
(iii) Number of students who cover a distance which is above $16\frac{1}{2}\mathrm{m}$.