Dispersion Diagrams and Box/Whisper Plots
- Created by: NTipper99
- Created on: 08-06-17 18:58
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- Dispersion Diagrams and Box/Whisper Plots
- What is it?
- Dispersion Diagram = Allows you to investigate usually the spread of a set of data.
- Box + Whisker plots can be added to a dispersion diagram to analyse the data further
- Box/Whisper Plots = these work by removing the extreme values and focusing on only the interquartile range
- Advantages
- By plotting the data on a vertical line the range becomes visually apparent
- Also helps to spot any anomalies and clusters of data
- Dispersion Diagrams of more than one data set can be drawn
- Provided the same scale has been used, it is possible to compare the dispersion's of different data sets to see how range and clustering vary
- Example
- A good example would be to compare dispersion of rainfall (variation of average rainfall for North West England
- Disadvantages
- Need at least 10 data sets + time consuming to plot
- What the X Axis and Y Axis Represent
- X Axis is usually very narrow, often representing location or a point in time
- Y Axis is longer and represents all the values in the data set
- What is it?
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