下表中有两个错误消息：
\begin{table}
\begin{tabular}{lllllll}
\hline
& \multicolumn{3}{l}{Correlated with Normal distribution} & \multicolumn{3}{l}{Uncorrelated with Normal distribution} \\
$\rho$ & $0\%$ & $3\%$ & $5\%$ & $0\%$ & $3%$ & $5\%$ \\ \hline
0.0 & 2.06 (0.17) & 2.72 (0.24) & 3.17 (0.29) & 1.98 (0.13) & 2.64 (0.19) & 3.15 (0.24) \\
0.3 & \textbf{2.04 (0.17)} & \textbf{2.74 (0.27)} & \textbf{3.24 (0.32)} & 1.98 (0.13) & 2.64 (0.19) & 3.15 (0.24) \\
0.5 & \textbf{2.02 (0.17)} & \textbf{2.71 (0.26)} & \textbf{3.19 (0.31)} & 1.97 (0.17) & 2.63 (0.19) & 3.14 (0.25) \\
0.7 & \textbf{2.00 (0.43)} & \textbf{2.71 (0.55)} & \textbf{3.19 (0.56)} & 1.99 (0.17) & 2.69 (0.18) & 3.22 (0.24) \\
0.9 & \textbf{1.93 (0.18)} & \textbf{2.65 (0.29)} & \textbf{3.13 (0.36)} & 1.98 (0.14) & 2.56 (0.21) & 3.15 (0.27) \\ \hline
& \multicolumn{3}{l}{Correlated with Student$-t$ distribution} & \multicolumn{3}{l}{Uncorrelated with Student$-t$ distribution} \\
$rho$ & $0\%$ & $3\%$ & $5\%$ & $0\%$ & $3\%$ & $5\%$ \\ \hline
0.0 & 2.06 (0.17) & 2.65 (0.20) & 3.03 (0.22) & 1.98 (0.13) & 2.57 (0.16) & 2.96 (0.18) \\
0.3 & \textbf{2.05 (0.17)} & \textbf{2.62 (0.19)} & \textbf{3.03 (0.21)} & 1.98 (0.13) & 2.57 (0.16) & 2.98 (0.18) \\
0.5 & \textbf{2.02 (0.17)} & \textbf{2.60 (0.18)} & \textbf{3.01 (0.20)} & 1.97 (0.13) & 2.57 (0.16) & 2.96 (0.18) \\
0.7 & \textbf{1.93 (0.13)} & \textbf{2.59 (0.19)} & \textbf{2.99 (0.20)} & 1.93 (0.13) & 2.53 (0.16) & 3.02 (0.18) \\
0.9 & \textbf{1.93 (0.18)} & \textbf{2.71 (1.89)} & \textbf{2.85 (0.19)} & 1.88 (0.15) & 2.78 (0.18) & 2.89 (0.20) \\ \hline
\end{tabular}
\end{table}
错误是Missing $ inserted. 0.0 &和Extra alignment tab has been changed to \cr. 0.0 & 2.06 (0.17) &
答案1
\您之前在标题后的第一行漏掉了一个%。另外，您不需要数学模式3\%等，数字应该与文本样式相匹配。
\begin{table}
\begin{tabular}{@{}*7l@{}}
\hline
& \multicolumn{3}{l}{Correlated with Normal distribution} & \multicolumn{3}{l@{}}{Uncorrelated with Normal distribution} \\
$\rho$ & 0\% & 3\% & 5\% & 0\% & 3\% & 5\% \\ \hline
0.0 & 2.06 (0.17) & 2.72 (0.24) & 3.17 (0.29) & 1.98 (0.13) & 2.64 (0.19) & 3.15 (0.24) \\
0.3 & \textbf{2.04 (0.17)} & \textbf{2.74 (0.27)} & \textbf{3.24 (0.32)} & 1.98 (0.13) & 2.64 (0.19) & 3.15 (0.24) \\
0.5 & \textbf{2.02 (0.17)} & \textbf{2.71 (0.26)} & \textbf{3.19 (0.31)} & 1.97 (0.17) & 2.63 (0.19) & 3.14 (0.25) \\
0.7 & \textbf{2.00 (0.43)} & \textbf{2.71 (0.55)} & \textbf{3.19 (0.56)} & 1.99 (0.17) & 2.69 (0.18) & 3.22 (0.24) \\
0.9 & \textbf{1.93 (0.18)} & \textbf{2.65 (0.29)} & \textbf{3.13 (0.36)} & 1.98 (0.14) & 2.56 (0.21) & 3.15 (0.27) \\ \hline
& \multicolumn{3}{l}{Correlated with Student$-t$ distribution} & \multicolumn{3}{l@{}}{Uncorrelated with Student$-t$ distribution} \\
$\rho$ & 0\% & 3\% & 5\% & 0\% & 3\% & 5\% \\ \hline
0.0 & 2.06 (0.17) & 2.65 (0.20) & 3.03 (0.22) & 1.98 (0.13) & 2.57 (0.16) & 2.96 (0.18) \\
0.3 & \textbf{2.05 (0.17)} & \textbf{2.62 (0.19)} & \textbf{3.03 (0.21)} & 1.98 (0.13) & 2.57 (0.16) & 2.98 (0.18) \\
0.5 & \textbf{2.02 (0.17)} & \textbf{2.60 (0.18)} & \textbf{3.01 (0.20)} & 1.97 (0.13) & 2.57 (0.16) & 2.96 (0.18) \\
0.7 & \textbf{1.93 (0.13)} & \textbf{2.59 (0.19)} & \textbf{2.99 (0.20)} & 1.93 (0.13) & 2.53 (0.16) & 3.02 (0.18) \\
0.9 & \textbf{1.93 (0.18)} & \textbf{2.71 (1.89)} & \textbf{2.85 (0.19)} & 1.88 (0.15) & 2.78 (0.18) & 2.89 (0.20) \\ \hline
\end{tabular}
\end{table}
