Marine biologists investigated whether there is an association between the type of beach substrate where a species of crab is found and the physical condition of its shell. They surveyed three distinct coastal zones (Sandy, Muddy, and Rocky) and recorded whether each crab's shell was intact or damaged. The frequency of crabs in each category is shown in Table 1.
Table 1: Shell condition of crabs found across different beach substrates
| Sandy | Muddy | Rocky | |
|---|---|---|---|
| Intact Shell | 45 | 18 | 32 |
| Damaged Shell | 15 | 22 | 48 |
Identify a suitable statistical test that the biologists could use to analyse the data in Table 1. Justify your choice.
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.