\begin{table*}[!t]
    \begin{minipage}[h]{0.49\textwidth}
        \vspace{-.1in}
          \caption{MSE Improvement for Each Program at Noise Level~10 with ADVI}
          \label{tab:imp_table_advi}
          \vspace{-.1in}
          \centering
          \scriptsize
          \setlength\tabcolsep{1.5pt}
          \begin{tabular}{r|rl|rl|rl}
\toprule
              Prog & \multicolumn{2}{|c|}{Outliers} & \multicolumn{2}{|c|}{Hidden Group} &\multicolumn{2}{|c}{Skewed} \\
\midrule
RE &          256.42 &       (StudentT) &            1.62 &        (Reparam) &         1.00 &    (Original) \\
RV &           28.04 &       (StudentT) &            2.78 &        (Reparam) &         1.00 &    (Original) \\
MC &           27.48 &         (Local1) &               - &                - &         1.00 &    (Original) \\
SE &           14.23 &       (StudentT) &            3.10 &       (StudentT) &         1.03 &     (Mixture) \\
RK &            8.41 &       (StudentT) &            3.69 &       (StudentT) &         1.00 &    (Original) \\
RN &            7.11 &        (Reparam) &            2.06 &         (Local2) &         1.00 &    (Original) \\
RU &            3.42 &       (StudentT) &            2.05 &       (StudentT) &         1.41 &      (Local2) \\
RA &            3.31 &       (StudentT) &            2.08 &       (StudentT) &         1.00 &    (Original) \\
MF &            3.27 &       (StudentT) &               - &                - &         1.23 &     (Reparam) \\
RQ &            3.23 &       (StudentT) &            2.32 &       (StudentT) &         1.26 &      (Local1) \\
RR &            2.95 &        (Reparam) &            2.02 &       (StudentT) &         1.14 &      (Local1) \\
RX &            2.93 &       (StudentT) &            1.94 &       (StudentT) &         1.14 &      (Local1) \\
SD &            2.52 &       (StudentT) &           12.31 &       (StudentT) &         1.00 &      (Local1) \\
MD &            2.21 &       (Reweight) &               - &                - &         1.16 &      (Local1) \\
ME &            1.27 &       (StudentT) &               - &                - &         1.13 &      (Local1) \\
RY &            1.25 &       (StudentT) &            1.00 &       (Original) &         1.00 &    (Original) \\
MB &            1.14 &       (StudentT) &               - &                - &         1.77 &      (Local1) \\
RG &            1.04 &       (StudentT) &               - &                - &            - &             - \\
SA &            1.02 &        (Mixture) &            2.04 &       (StudentT) &         1.03 &      (Local1) \\
RW &            1.00 &       (Reweight) &               - &                - &            - &             - \\
SB &            1.00 &       (StudentT) &            1.00 &         (Local1) &         1.00 &      (Local1) \\
SC &            1.00 &       (Original) &            1.42 &         (Local1) &         1.00 &    (Original) \\
RL &            1.00 &       (Original) &            1.00 &       (Original) &         4.51 &      (Local2) \\
MA &            1.00 &       (Original) &               - &                - &         2.19 &      (Local1) \\
\bottomrule
\end{tabular}
          \vspace{-0.1in}
      \end{minipage}
      \hspace{0.1in}
      ~
      \begin{minipage}[h]{0.49\textwidth}
          \vspace{-.1in}
          \caption{MSE Improvement for Each Program at Noise Level~10 with NUTS}
          \label{tab:imp_table_nuts}
          \vspace{-.1in}
          \centering
          \scriptsize
          \setlength\tabcolsep{1.5pt}
          \begin{tabular}{r|rl|rl|rl}
              \toprule
              Prog & \multicolumn{2}{|c|}{Outliers} & \multicolumn{2}{|c|}{Hidden Group} &\multicolumn{2}{|c}{Skewed} \\
              \midrule
RE &          412.60 &       (StudentT) &            4.59 &        (Reparam) &         1.00 &      (Local1) \\
RV &           31.94 &        (Reparam) &            2.73 &        (Reparam) &         1.00 &    (Original) \\
MC &            1.00 &       (Original) &               - &                - &         1.01 &     (Reparam) \\
SE &           16.02 &       (Reweight) &            3.15 &        (Reparam) &         1.00 &    (Original) \\
RK &            9.25 &        (Reparam) &            5.65 &       (StudentT) &         1.00 &    (Original) \\
RN &            6.25 &         (Local2) &            5.54 &        (Reparam) &         1.00 &    (Original) \\
RU &            3.75 &       (StudentT) &            2.26 &       (StudentT) &         1.00 &      (Local1) \\
RA &            3.19 &        (Reparam) &            2.14 &       (StudentT) &         1.00 &    (Original) \\
MF &            2.81 &        (Reparam) &               - &                - &         1.05 &      (Local1) \\
RQ &            3.78 &       (StudentT) &            2.34 &       (StudentT) &         1.00 &    (Original) \\
RR &            3.00 &        (Reparam) &            1.94 &       (StudentT) &         1.00 &      (Local1) \\
RX &            3.18 &        (Reparam) &            2.07 &       (StudentT) &         1.00 &      (Local1) \\
SD &            3.52 &       (StudentT) &           11.23 &        (Reparam) &         1.00 &      (Local1) \\
MD &            6.08 &       (Reweight) &               - &                - &         2.10 &    (Reweight) \\
ME &            1.41 &        (Reparam) &               - &                - &         1.00 &    (Original) \\
RY &            1.00 &       (Original) &            1.05 &        (Reparam) &         1.67 &      (Local1) \\
MB &            1.22 &       (StudentT) &               - &                - &         2.15 &      (Local1) \\
RG &            1.03 &       (Reweight) &               - &                - &            - &             - \\
SA &            1.56 &        (Reparam) &            2.42 &       (StudentT) &         1.04 &      (Local1) \\
RW &            1.00 &       (Reweight) &               - &                - &            - &             - \\
SB &            1.00 &       (Original) &            1.00 &       (StudentT) &         1.00 &    (Reweight) \\
SC &            1.05 &         (Local1) &            1.36 &       (Reweight) &         1.00 &    (Original) \\
RL &            1.00 &       (Original) &            1.01 &         (Local1) &         1.01 &      (Local1) \\
MA &            1.68 &       (StudentT) &               - &                - &         1.94 &      (Local1) \\
\bottomrule
\end{tabular}
          \vspace{-.1in}
      \end{minipage}
  \end{table*}
