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7 The following are marks obtained in a history class for students and were grouped as follows: Marks Frequency 0-15 6 15-30 11 30-45 15

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7 The following are marks obtained in a history class for students and were grouped as follows: Marks Frequency 0-15 6 15-30 11 30-45 15 45-60 22 60-75 5 (a) Draw a cumulative frequency graph showing the marks. [4 marks] (b) From the graph, find (i) the median mark. (ii) the interquartile range. [2 marks]

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