Dispersion Diagrams and Box/Whisper Plots

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  • 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

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