\documentclass{standalone}

\begin{document}

\begin{tabular}{|p{2cm}|p{5cm}|p{5cm}|}
  \hline
  Type & Parametric & Non parametric\\
  \hline
  not paired & \textbf{mean comparison}: \textbf{$t$ test} (equivalent to ANOVA with 1 factor; strongly connected to linear models): $X$ is Gaussian and variances between groups are equal OR \textbf{Welsh test} (same test but with inequal variances between groups) & often described as \textbf{median comparison}: \textbf{Wilcoxon test (or Mann Whitney test)} based on ranks\\
  \hline
  paired & \textbf{mean comparison}: \textbf{$t$ test} & often described as 
\textbf{median comparison}: \textbf{Wilcoxon test} \\
  \hline
\end{tabular}


\end{document}
