2D Line Plot (or Categorized Line Plot) of Means with "Error Bars"

You can create a 2D line plot of means with "error bars" via the 2D Box Plots dialog. In this dialog, select Mean as the Middle Point and then select the Connect Middle Points option in order to "draw" a line connecting the means in the graph.

Similarly, you can create a categorized 2D line plot of means with "error bars" via the same options in the Categorized Box Plots dialog.