The cumulative frequency graph gives information about the waiting times, in minutes, of people with appointments at Hospital A. (a) Use the graph to find an estimate of the median waiting time at Hospital A. (1) (b) Use the graph to find an estimate of the interquartile range of the waiting times at Hospital A. minutes (2) At a different hospital, Hospital B, the median waiting time is 28 minutes and the interquartile range of the waiting times is 19 minutes. (c) Compare the waiting times at Hospital A with the waiting times at Hospital B. (2)

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