Monday, 20 May 2013

Fieldwork: Scattergraph

A scattergraph of distance from sea against percentage plant cover.

Dependent Variable: % of Vegetation cover
Independent variable: Distance from the sea (the one we changed)


  • Shows the 'direction' of a relationship between 2 sets of variables through the line of best fit
  • Indicates strength of correlation by how close the points are to the line of best fit
  • Simple and visual representation of correlation
  • Shows anomalies


  • Have to subjectively assess the strength and correlation of the relationship
  • Individual sites are hard to identify
Ideally we would use it in conjunction with a spearmans rank.

Our results so show a positive relationship so vegetation does seem to increase but it is a fairly weak relationship as there are lots of anomalies.

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