Summary/Background
You must be clear about how to find the median, upper quartile (UQ) and lower quartile (LQ) from a cumulative frequency graph. To find the median you should start from the point halfway up to the total frequency on the vertical axis, draw a line across to the curve and then down to the horizontal axis. To find the LQ and UQ you start from a quarter and from three-quarters the way up on the vertical axis.
Remember that the Interquartile range = Upper quartile - Lower quartile. You should know how to draw a number of other statistical diagrams too, including:
scatter diagrams, pie charts, bar charts, line graphs, stem & leaf diagrams and box & whisker plots
Remember that the Interquartile range = Upper quartile - Lower quartile. You should know how to draw a number of other statistical diagrams too, including:
scatter diagrams, pie charts, bar charts, line graphs, stem & leaf diagrams and box & whisker plots
Software/Applets used on this page
This question appears in the following syllabi:
Syllabus | Module | Section | Topic | Exam Year |
---|---|---|---|---|
AQA AS Maths 2017 | Statistics | Data Presentation and Interpretation | Cumulative Frequency | - |
AQA AS/A2 Maths 2017 | Statistics | Data Presentation and Interpretation | Cumulative Frequency | - |
AQA GCSE (9-1) Higher (UK) | S: Statistics | S3: Grouped Data, Histograms and Cumulative Frequency | Cumulative Frequency | - |
CBSE X (India) | Statistics and Probability | Statistics | Cumulative frequency graph | - |
CIE IGCSE (9-1) Maths (0626 UK) | 9 Statistics | E9.7 Cumulative Frequency and Box-Plots | Cumulative Frequency | - |
Edexcel AS Maths 2017 | Statistics | Data Presentation and Interpretation | Cumulative Frequency | - |
Edexcel AS/A2 Maths 2017 | Statistics | Data Presentation and Interpretation | Cumulative Frequency | - |
Edexcel GCSE (9-1) Higher (UK) | S: Statistics | S3: Grouped Data, Histograms and Cumulative Frequency | Cumulative Frequency | - |
GCSE Higher (UK) | Statistics | Displaying data | Cumulative frequency | - |
OCR AS Maths 2017 | Statistics | Working with Data | Cumulative Frequency | - |
OCR GCSE (9-1) Higher (UK) | 12: Statistics | 12.02b: Grouped Data | Cumulative Frequency | - |
OCR MEI AS Maths 2017 | Statistics | Working with Data | Cumulative Frequency | - |
Universal (all site questions) | D | Displaying data | Cumulative frequency | - |