Documentation for SKEW.P Original question is here.
I think the formula for population skewness from photo here is wrong.
I think correct formula is this.
Am i right?
[EDIT]

*

*Please check the example and the result in documentation with both formulas.


First off, the formula in Excel's documentation is not really a valid formula for anything: there is a dashed-line square in there, which is a graphical placeholder for a term in Microsoft's equation editor and means nothing.
If you simply ignore it, you do not get a valid formula for skewness. The quickest way to see this is that the result is not scale-free (skewness is a "standardized" measure).
Fortunately, the formula in the documentation is not what Excel actually does, it is just a typographical error in the documentation. You can figure this out by taking a small dataset and computing it by hand with either formula and comparing to SKEW.P's result. I haven't tested it extensively, but it appears to be applying the other formula that you've shown, and it definitely does not use the one in the documentation.
