BRAINCAKERandom Sampling
In random sampling every individual or position in the area has an equal chance of being chosen. This removes sampling bias.
A common method for sampling plants or slow-moving animals uses quadrats:
1. Lay out two tape measures at right angles along two edges of the area to make a grid.
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Key terms in this lesson
- sampling bias
- A distortion in the results of a sample caused by the individuals studied not being representative of the population, often because the investigator has, consciously or unconsciously, chosen atypical individuals.
More in Biodiversity
- Comparing DNA
- Comparing mRNA
- Comparing Amino-acids Sequences
- Sampling
- Normal Distribution
- Mean, median and Mode
- Mean and Standard Deviation
- Interpreting Graphs 1
All 33 lessons in Biodiversity · All AQA AS-level Biology topics