IB ESS 2.1.15 Estimating population abundance
IB ESS 2.1.15 Estimating population abundance

IB Environmental Systems and Societies syllabusESS SL/HLFirst assessment 2026
Practise choosing sampling designs to estimate abundance and explaining how method choice affects population evidence.
How this is tested
- choose random, systematic or transect sampling for a stated population
- explain how sampling design affects abundance estimates and bias
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