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)

Positives:

• 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

Negatives:

• 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.