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 |