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Table 3 Average bias (kg) produced by different sampling methods and sample sizes based on 5,000 simulations

From: Evaluation of sampling strategies to estimate crown biomass

Sample size Sampling strategies
SRS SRS-RAT PPS SYS SYS-RAT STR STR-RAT STR-PPS
3 0.237 −4.091 −0.158 0.433 −9.320 −0.659 −3.554 −0.104
6 0.215 −1.711 0.010 0.139 −1.922 0.399 −1.387 −0.101
9 −0.081 −0.937 −0.068 0.133 0.166 0.191 −0.857 −0.094
12 −0.030 −0.894 0.158 0.043 −0.078 −0.242 −0.776 −0.073