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Table 4 Relative bias (percent) 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 0.101 −2.437 −0.169 0.107 −6.086 −0.321 −2.107 −0.034
6 −0.001 −1.115 0.024 0.061 −1.061 0.197 −0.900 −0.012
9 0.063 −0.600 −0.027 0.038 0.033 0.148 −0.543 −0.069
12 −0.011 −0.523 0.100 0.037 0.032 −0.035 −0.439 −0.040