Why should quadrats be placed randomly in a sampling investigation?
Answer and explanation
Correct answer: B. To avoid bias in the results
- Step 1: A random placement gives each area a fair chance.
- Step 2: This avoids bias.
Answer
To avoid bias in the results.
Why not the others: To get every quadrat on the same species: this would bias results. To save time in the field: speed is not the reason. To make sure all the plants are counted: only the sampled areas are counted.
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