The table shows the numbers of two species, F and G, found in in eight randomly placed 10 × 10 m quadrats.

a. Draw a scatter graph of these results.

b. Describe the relationship that is suggested by your scatter graph.

c. Explain why it is better to use Spearman’s rank correlation, rather than Pearson’s linear correlation test, to find out if there is a correlation between the numbers of species F and species G.

d. Use Spearman’s rank correlation to analyse these results. (Note: if two values are equal, then you must give them equal rank.) Show all of your working, and explain what your calculated value indicates.

Transcribed Image Text:

Quadrat Number of species F Number of species G 1 34 8. 8. 22 3 47 8 4 19 21 6 38 41 3 7 22 15 8 38 10