For my A2 coursework I must choose an appropriate statistical test which is most suited to the coursework title and given data (entitled 'results table- ecology.)
I must choose one of the following statistical tests:
*Students t test/Mann Whitney U test (which looks at differences)
*Spearman’s Rank correlation coefficient (which tests the strength of a relationship)
I'm lead to believe that the most suitable statistical test would be the Mann Whitney U test. However, I’m not entirely sure so I’ve hit a dead end an it‘s making my summer hell. Please shed some light.
Thanks in advance.
Even with your data, its difficult to be certain. For comparing 'trampled' with 'not trampled', the t test would probably be best. If comparing 'more trampled' with 'less trampled' (which i think is what your data is) the Mann Whitney Test is better. In other words 'trampled' is a range of a variable rather than a strict category. The Spearman Rank test is not appropriate unless you have a way of measuring degree of trampling so that it becomes a measured continuous variable