Table 5 Mean prediction errors (MPE (%)) of the aboveground biomass models over site, dbh class, and ht class
Parameter | n | MPE (%) | |||
|---|---|---|---|---|---|
Model form 3 | Model form 4 | ||||
Fixed effects model | Random effects model | Fixed effects model | Random effects model | ||
Site | |||||
 Pangani | 15 | −4.4 | −2.2 | −9.1 | 4.6 |
 Bagamoyo | 45 | 7.3 | 8.2 | −2.9 | −1.3 |
 Rufiji | 45 | −9.5 | −10.7 | 2.2 | −0.0 |
 Lindi-Mtwara | 15 | 20.8 | 22.9 | 5.0 | 8.8 |
dbh class (cm) | |||||
 1.0–10.0 | 45 | 12.8 | 12.6 | 10.3 | 9.8 |
 10.1–20.0 | 20 | −3.2 | −3.6 | −2.7 | −2.9 |
 20.1–30.0 | 20 | −4.7 | −3.4 | −5.5 | −3.8 |
 30.1–40.0 | 24 | −1.4 | −0.7 | −1.2 | 0.1 |
 40.0 | 10 | 2.0 | 1.8 | 1.1 | 0.8 |
ht class (m) | |||||
 1.0–5.0 | 24 | 10.2 | 11.7 | −10.8 | −9.5 |
 5.1–10.0 | 36 | 25.2 | 24.7 | 8.4 | 7.9 |
 10.1–15.0 | 29 | 4.7 | 6.7 | −3.6 | −0.2 |
 15.1–20.0 | 14 | −15.1 | −12.0 | −14.8 | −9.5 |
  > 20.0 | 16 | −3.2 | −6.8 | 11.8 | 5.6 |