Average of fourth quartile

[kennethand]

How do I find the average of the fourth quartile?

I can find the fourth quartile point using this expression: Fractile(Q21Num, 0.75).

But how do I get average of the values belonging to the fourth quartile ?

[TKendrick20]

That should work, I just had my sign backwards in my example.

AVG({$<[Q21Num] = {">=$(=vFractile)"}>} [Q21Num])

[kennethand]

Excellent - thanks, it did the trick!