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CAIE A-Level Biology 18.2.3 Importance of Random Sampling

Practise designing random sampling with grids and random coordinates, then explain how sample size, repetition and unbiased placement affect reliability.

Syllabus
2028–2030
Course
Biology 9700
Level
A2

Exam points

  • place quadrats with grid coordinates from a random-number generator to reduce bias
  • link larger repeated samples with representativeness and reduced anomaly effects

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