The table shows information about the number of minutes each of 120 buses was late last Monday. (a) Complete the cumulative frequency table below. (1) (b) On the grid, draw a cumulative frequency graph for your table. (2) (c) Use your graph to find an estimate for the interquartile range. (2) (d) Use your graph to find an estimate for the number of buses that were more than 48 minutes late last Monday. (2)

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