OK, that's straightforward.
Say you want Mean and Variance of Age.
In a pivot table, drag Age into the Data section, then do it again. You will have SumofAge amd SumofAge2 as the fields. Right-click the first, Field Settings > Average. For the second, set it to Var.
This will give you 2 rows for each row item. To see the data side by side, pivot the Data label on top of the Total label, and let go.
Denis