# Stochastic Models to Qualify Stem Tapers
## 4 Discussion
### Final Fitting
\begin{table}
\begin{tabular}{c c c c c c c c c c c c} \hline \hline \multirow{2}{*}{**Model**} & **B** & **AB** & **RMSE** & **B** & **AB** & **RMSE** & **R2** & **B** & **AB** & **RMSE** & **R2** \\  & **(\%)** & **(\%)** & **(\%)** & **(\%)** & **(\%)** & **(\%)** & **(\%)** & **(\%)** & **(\%)** & **(\%)** & **(\%)** & **(\%)** \\ \hline \multirow{2}{*}{**1**} & 0.007 & 0.040 & 0.060 & \multirow{2}{*}{0.983} & \multirow{2}{*}{0.005} & \multirow{2}{*}{0.020} & \multirow{2}{*}{0.025} & \multirow{2}{*}{0.981} & \multirow{2}{*}{0.000} & \multirow{2}{*}{0.051} & \multirow{2}{*}{0.088} \\  & (1.39) & (7.76) & (11.59) & & & & & & & \\ \hline \multirow{2}{*}{**3**} & 0.009 & 0.041 & 0.060 & \multirow{2}{*}{0.984} & \multirow{2}{*}{0.004} & \multirow{2}{*}{0.020} & \multirow{2}{*}{0.980} & \multirow{2}{*}{0.000} & \multirow{2}{*}{0.052} & \multirow{2}{*}{0.089} \\  & (1.74) & (7.81) & (11.57) & & & & & & & \\ \hline \multirow{2}{*}{**10**} & 0.011 & 0.040 & 0.059 & \multirow{2}{*}{0.086} & \multirow{2}{*}{0.006} & \multirow{2}{*}{0.020} & \multirow{2}{*}{0.025} & \multirow{2}{*}{0.981} & \multirow{2}{*}{0.003} & \multirow{2}{*}{0.045} & \multirow{2}{*}{0.075} \\  & (2.17) & (7.68) & (11.42) & & & & & & & \\ \hline \multirow{2}{*}{**1**} & **Black alder** & **White alder** & **Aspen** & & & & & & & \\ \hline \multirow{2}{*}{**1**} & 0.005 & 0.027 & 0.036 & \multirow{2}{*}{0.982} & \multirow{2}{*}{0.005} & \multirow{2}{*}{0.017} & \multirow{2}{*}{0.028} & \multirow{2}{*}{0.967} & \multirow{2}{*}{0.009} & \multirow{2}{*}{0.041} & \multirow{2}{*}{0.061} \\  & (1.08) & (5.91) & (7.91) & & & & & & & \\ \hline \multirow{2}{*}{**3**} & 0.004 & 0.027 & 0.037 & \multirow{2}{*}{0.981} & \multirow{2}{*}{0.005} & \multirow{2}{*}{0.017} & \multirow{2}{*}{0.028} & \multirow{2}{*}{0.968} & \multirow{2}{*}{0.009} & \multirow{2}{*}{0.041} & \multirow{2}{*}{0.061} \\  & (0.96) & (6.01) & (8.04) & & & & & & & \\ \hline \multirow{2}{*}{**10**} & 0.002 & 0.027 & 0.037 & \multirow{2}{*}{0.981} & \multirow{2}{*}{0.005} & \multirow{2}{*}{0.017} & \multirow{2}{*}{0.028} & \multirow{2}{*}{0.967} & \multirow{2}{*}{0.009} & \multirow{2}{*}{0.041} & \multirow{2}{*}{0.061} \\  & (0.36) & (5.89) & (8.06) & & & & & & & \\ \hline \multirow{2}{*}{**Pine**} & **Sprace** & & & & & & & & & \\ \hline \multirow{2}{*}{**1**} & 0.004 & 0.043 & 0.073 & \multirow{2}{*}{0.981} & \multirow{2}{*}{0.011 \({}^{*}\)} & \multirow{2}{*}{0.044} & \multirow{2}{*}{0.065} & \multirow{2}{*}{0.982} & \multirow{2}{*}{0.981} \\  & (0.71) & (7.01) & (12.06) & & & & & & & \\ \hline \multirow{2}{*}{**3**} & 0.005 & 0.044 & 0.075 & \multirow{2}{*}{0.982} & \multirow{2}{*}{0.010 \({}^{*}\)} & \multirow{2}{*}{0.044} & \multirow{2}{*}{0.067} & \multirow{2}{*}{0.981} & \multirow{2}{*}{0.981} \\  & (0.80) & (7.21) & (12.37) & & & & & & & \\ \hline \multirow{2}{*}{**10**} & -0.007 & 0.040 & \multirow{2}{*}{0.069} & \multirow{2}{*}{0.985} & \multirow{2}{*}{\(-0.001\)} & \multirow{2}{*}{0.040} & \multirow{2}{*}{0.062} & \multirow{2}{*}{0.983} & \multirow{2}{*}{0.983} \\  & (–1.10) & (6.61) & (11.29) & & & & & & \\ \hline \hline \end{tabular}  
* * The bias of residuals is significant (-test, \(p=0.05\)).  
\end{table} 
Table 6: Statistical measures for all fitted volume models.