Fieldwork and sampling techniques Quiz
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5 questions, one answer each
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1. Counts in four quadrats are 3, 8, 4 and 5. What is the mean?
- A. 20
- B. 4
- C. 6
- D. 5
2. The mean is 12 plants per m² and the area is 200 m². What is the estimated population?
- A. 2400
- B. 212
- C. 240
- D. 1200
3. Why are quadrats placed using random coordinates?
- A. To make counting quicker
- B. To avoid bias in where samples are taken
- C. To sample only the best areas
- D. To measure percentage cover only
4. 20 fish are marked. A second sample of 30 contains 6 marked fish. What is the estimated population?
- A. 50
- B. 90
- C. 100
- D. 180
5. Which sampling method is best for showing how plant cover changes from a path into woodland?
- A. A transect
- B. Random quadrats
- C. Mark-release-recapture
- D. Pitfall traps