Median Value of a Table with Distinct Values

[Anonymous]

Spoiler

Hello Guys, 
I have the following Problem: 
I have a Production Data Sample for Process Mining. This shows the different Cases (1 Case = 1 Product) and the corresponding Processes behind it. So Case 1 for example has 10 underlying Processes --> so the table looks like the following: 

As you can see I filtered only for Case 1 but this repeats itself for every case (some even havy the same Process 10x or so). 

I already calculated the Duration by Case ID so every Process added up and now I want the Median of every Duration by Case ID .

It would be a huge help because I am new to Power BI and dont know how to master this.

Kind Regards 

[Anonymous]

[Median Duration] :=
var __caseId = Table[case]
RETURN
	MEDIANX(
		FILTER(
			Table[Duration],
			Table[case] = __casedId 
		),
		Table[Duration]
	)

This is not a measure. It's a calculated column. Table is the name of the second table where 'case' sits.

Best

Darek