The cumulative frequency graph shows information about the time, in seconds, taken by 80 athletes to complete a sprint.

Find the median time.
Find the interquartile range.
Practise Edexcel GCSE Maths Cumulative Frequency with exam-style questions for Foundation and Higher tier. 24 questions, matched to the Edexcel GCSE Maths (1MA1) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.