## 3 Results and Discussions
### Results of Age Prediction for Labeled Datasets and Comparison
\begin{tabular}{c c c c c c} \hline \hline \multirow{2}{*}{**Hypothesis**} & \multicolumn{2}{c}{**MAE**} & \multicolumn{2}{c}{**RMSE**} & \multirow{2}{*}{**Supported**} \\ \cline{2-2} \cline{5-6}  & \(\mathbf{t}\) & \(\mathbf{p}\)**-Value** & \(\mathbf{t}\) & \(\mathbf{p}\)**-Value** & \\ \hline \(\text{NNR}^{\text{single}}\)\textgreater{} \textgreater{} \textgreater{} \textless{}NNR}^{\text{single}}\) & \(38.5257\) & \(0.0000\) *** & \(24.3066\) & \(0.0000\) *** & Yes \\ \hline \(\text{NNR}^{\text{single}}\)\textgreater{} \textgreater{} \textless{}MLR^{\text{multi}}\) & \(-134.3845\) & \(0.0000\) *** & \(-276.1103\) & \(0.0000\) *** & Yes (opposite) \\ \hline \(\text{NNR}^{\text{single}}\)\textgreater{} \textgreater{}NNR^{\text{multi}}\) & \(33.6470\) & \(0.0000\) *** & \(8.2965\) & \(0.0000\) *** & Yes \\ \hline \(\text{NNR}^{\text{single}}\)\textgreater{} \textgreater{}DTR^{\text{multi}}\) & \(-155.2202\) & \(0.0000\) *** & \(-164.6572\) & \(0.0000\) *** & Yes (opposite) \\ \hline \(\text{NNR}^{\text{single}}\)\textgreater{} SVR^{\text{multi}}\) & \(85.1937\) & \(0.0000\) *** & \(55.1925\) & \(0.0000\) *** & Yes \\ \hline \(\text{NNR}^{\text{single}}\)\textgreater{} \textgreater{}NNR^{\text{multi}}\) & \(33.1459\) & \(0.0000\) *** & \(20.8643\) & \(0.0000\) *** & Yes \\ \hline \(\text{NNR}^{\text{single}}\)\textgreater{} RFR^{\text{multi}}\) & \(72.8377\) & \(0.0000\) *** & \(52.4563\) & \(0.0000\) *** & Yes \\ \hline \(k\text{-NNR}^{\text{single}}\)\textgreater{} MLR^{\text{multi}}\) & \(-229.1540\) & \(0.0000\) *** & \(-299.1235\) & \(0.0000\) *** & Yes (opposite) \\ \hline \(k\text{-NNR}^{\text{single}}\)\textgreater{} NNR^{\text{multi}}\) & \(5.9086\) & \(0.0000\) *** & \(-3.4503\) & \(0.0008\) *** & No \\ \hline \(k\text{-NNR}^{\text{single}}\)\textgreater{} DTR^{\text{multi}}\) & \(-338.7725\) & \(0.0000\) *** & \(-231.9032\) & \(0.0000\) *** & Yes (opposite) \\ \hline \(k\text{-NNR}^{\text{single}}\)\textgreater{} SVR^{\text{multi}}\) & \(83.1917\) & \(0.0000\) *** & \(37.6899\) & \(0.0000\) *** & Yes \\ \hline \(k\text{-NNR}^{\text{single}}\)\textgreater{} k\text{-NNR}^{\text{multi}}\) & \(-9.1403\) & \(0.0000\) *** & \(-3.9958\) & \(0.0001\) *** & Yes (opposite) \\ \hline \(k\text{-NNR}^{\text{single}}\)\textgreater{} RFR^{\text{multi}}\) & \(60.8346\) & \(0.0000\) *** & \(34.4006\) & \(0.0000\) *** & Yes \\ \hline \(\text{MLR}^{\text{multi}}\)\textgreater{} NNR^{\text{multi}}\) & \(166.1897\) & \(0.0000\) *** & \(218.8488\) & \(0.0000\) *** & Yes \\ \hline \(\text{MLR}^{\text{multi}}\)\textgreater{} DTR^{\text{multi}}\) & \(6.2753\) & \(0.0000\) *** & \(206.2436\) & \(0.0000\) *** & Yes \\ \hline \(\text{MLR}^{\text{multi}}\)\textgreater{} SVR^{\text{multi}}\) & \(289.3370\) & \(0.0000\) *** & \(314.9457\) & \(0.0000\) *** & Yes \\ \hline \(\text{MLR}^{\text{multi}}\)\textgreater{} \(k\text{-NNR}^{\text{multi}}\) & \(222.4004\) & \(0.0000\) *** & \(296.9896\) & \(0.0000\) *** & Yes \\ \hline \(\text{MLR}^{\text{multi}}\)\textgreater{} RFR^{\text{multi}}\) & \(275.3113\) & \(0.0000\) *** & \(313.2876\) & \(0.0000\) *** & Yes \\ \hline \(\text{NNR}^{\text{multi}}\)\textgreater{} DTR^{\text{multi}}\) & \(-190.7444\) & \(0.0000\) *** & \(-90.2455\) & \(0.0000\) *** & Yes (opposite) \\ \hline \(\text{NNR}^{\text{multi}}\)\textgreater{} SVR^{\text{multi}}\) & \(37.5580\) & \(0.0000\) *** & \(18.5418\) & \(0.0000\) *** & Yes \\ \hline \(\text{NNR}^{\text{multi}}\)\textgreater{} \(k\text{-NNR}^{\text{multi}}\) & \(-10.9507\) & \(0.0000\) *** & \(1.8082\) & \(0.0736\) *** & No \\ \hline \(\text{NNR}^{\text{multi}}\)\textgreater{} RFR^{\text{multi}}\) & \(25.7457\) & \(0.0000\) *** & \(17.3319\) & \(0.0000\) *** & Yes \\ \hline \(\text{DTR}^{\text{multi}}\)\textgreater{} SVR^{\text{multi}}\) & \(448.2618\) & \(0.0000\) *** & \(273.8899\) & \(0.0000\) *** & Yes \\ \hline \(\text{DTR}^{\text{multi}}\) \textgreater{} \(k\text{-NNR}^{\text{multi}}\) & \(327.3412\) & \(0.0000\) *** & \(225.4759\) & \(0.0000\) *** & Yes \\ \hline \(\text{DTR}^{\text{multi}}\) \textgreater{} RFR^{\text{multi}}\) & \(427.0787\) & \(0.0000\) *** & \(268.2875\) & \(0.0000\) *** & Yes \\ \hline \(\text{SVR}^{\text{multi}}\) \textgreater{} \(k\text{-NNR}^{\text{multi}}\) & \(-92.3828\) & \(0.0000\) *** & \(-41.3531\) & \(0.0000\) *** & Yes (opposite) \\ \hline \(\text{SVR}^{\text{multi}}\) \textgreater{} RFR^{\text{multi}}\) & \(-24.6128\) & \(0.0000\) *** & \(-2.9794\) & \(0.0036\) *** & Yes (opposite) \\ \hline \(k\text{-NNR}^{\text{multi}}\) \textgreater{} RFR^{\text{multi}}\) & \(70.2213\) & \(0.0000\) *** & \(38.0674\) & \(0.0000\) *** & Yes \\ \hline \hline \end{tabular}