A marine biologist is investigating whether there is an association between the seabed substrate type (Sandy, Rocky, or Muddy) and the species of crab predominantly found there (Shore Crab, Hermit Crab, or Edible Crab). The researcher records the frequencies of crabs observed in a random sample of 180 sightings across different coastal zones.
Identify the most appropriate statistical test for analysing the data collected in this study. Explain three reasons for your choice, referring to the context of this study.
121 exam-style questions on AQA A Level Psychology Inferential testing (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.