How to do it...

To implement this recipe, perform the following steps:

1. Create the following measures:

My Standard Deviation = 
    VAR __Table = ALLSELECTED('R04_Table')
RETURN
    STDEVX.P(__Table,[Value])

My Standard Deviation Debug = 
    VAR __Table = ALLSELECTED('R04_Table')
RETURN
    //STDEVX.P(__Table,[Value])
    FIRSTNONBLANK(
        SELECTCOLUMNS(
            __Table,
            "__Value",[Value]
        ),
        [__Value]
    )
    & "," &
   LASTNONBLANK(
        SELECTCOLUMNS(
            __Table,
            "__Value",[Value]
        ),
        [__Value]
    )

2. On a Report page, create a Slicer visualization and place the Color column from R06_Table in the Field area of the visualization.
3. On the same Report page, create a Card visualization and place the My Standard Deviation measure in the Fields area of the visualization.
4. On the same Report page, create a second Card visualization and place the My Standard Deviation Debug measure in the Fields area of the visualization.