A marine biologist conducted an observational study to investigate the habitat preferences of hermit crabs (Pagurus bernhardus) along a rocky shoreline during low tide. Over a five-day period, the researcher recorded the primary micro-habitat of each crab encountered. The results are shown in the table below.
Table 1: Primary micro-habitats of hermit crabs observed during low tide
| Micro-habitat | Kelp holdfasts | Rocky crevices | Sandy tide pools | Under driftwood | Open sand | Total |
|---|---|---|---|---|---|---|
| Frequency | 94 | 153 | 112 | 45 | 18 | 422 |
State the mode for the micro-habitat where the hermit crabs were observed.
513 exam-style questions on OCR A Level Psychology Data recording, analysis and presentation. Each one has a worked solution and a mark scheme showing where the marks go.