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Hi Experts,
In my Cpk calculation, I see STDEV.S is giving incorrect value.
Data set I have as below
-11.67 |
-11.71 |
-11.67 |
-11.67 |
-11.69 |
-11.65 |
-11.68 |
-11.67 |
-11.63 |
-11.60 |
-11.65 |
I expect value as
MEAN | -11.6627 |
STD | 0.0297 |
CpK | 37.46 |
But my Cpk value is 39.18. When I debugged issue, I see std deviation caculation is different .
Formula I use is
Solved! Go to Solution.
Issue is resolved now. There was data discrepency when I am loading data using M query. I removed some colunms and removed duplicate values. Now its working fine.
There is no issue with STDEV.S and STDEV.P calculation in power BI.
Thanks,
Neha
Hi @nehajadhav166 ,
Could you tell me if your problem has been solved? If it is, kindly Accept it as the solution. More people will benefit from it. Or if you are still confused about it, please provide me with more details about your table and your problem or share me with your pbix file after removing sensitive data.
Refer to:
How to provide sample data in the Power BI Forum
How to Get Your Question Answered Quickly
Best Regards,
Jianbo Li
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
Issue is resolved now. There was data discrepency when I am loading data using M query. I removed some colunms and removed duplicate values. Now its working fine.
There is no issue with STDEV.S and STDEV.P calculation in power BI.
Thanks,
Neha
@nehajadhav166 Correct.
This is strange.I use below formula.
@nehajadhav166 Mystery. See my attached PBIX below sig.
@nehajadhav166 How is CPK being calculated? Your formula. If I use STDEV.S I get back 0.0297 whereas STDEV.P returns 0.02831. So use STDEV.S?
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