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Cumulative Frequency

Cumulative Frequency. 30-Jul-14. More resources available from: free-online-calculator.net. The following gives information from a survey of 47 students about the time taken by them to eat their breakfast in the morning. Draw the cumulative frequency graph and use this to find: The median

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Cumulative Frequency

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  1. Cumulative Frequency 30-Jul-14 More resources available from: free-online-calculator.net

  2. The following gives information from a survey of 47 students about the time taken by them to eat their breakfast in the morning. • Draw the cumulative frequency graph and use this to find: • The median • The interquartile range More resources available from: free-online-calculator.net

  3. The following gives information from a survey of 47 students about the time taken by them to eat their breakfast in the morning. Cumulative frequency 10 26 40 44 46 47 • Draw the cumulative frequency graph and use this to find: • The median • The interquartile range More resources available from: free-online-calculator.net

  4. 60 50 40 Cumulative frequency 30 20 10 The upperboundary for each class interval is plotted against its cumulative frequency. 30 40 10 20 Time in minutes Middle value is ½ X (47+1) = 24 The time associated with the 24th value gives us a median of 9 minutes. Upper Quartile = 14 minutes. Lower Quartile = 6 minutes. The lower quartile is ¼ X (47+1)th vaue. The upper quartile is 3/4 X (47+1)th vaue. Interquartile range = 14 – 6 = 8 More resources available from: free-online-calculator.net

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