Dashed table column separator [duplicate]

I'm trying to create a table with dashed separators between my subcolumns. This is the kind of result I need (with | representing continuous separators and ╎ representing dashed separators):

+----------+-------------------+
|Data group|Stats              |
+----------+-------------------+
|A         |Q1   ╎Med    ╎Q3   |
+----------+-------------------+
|B         |Q1   ╎Med    ╎Q3   |
+----------+-----+-------+-----+


Is there a way to do it? A specific column separator to use in the \begin{tabular}{|l|l|l|l|}?

You can use \multicolumn{number of columns}{align}{text} to join multiple columns into one for a single row.