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1. Re: QQ Plot Formula
Patrick A Van Der Hyde May 3, 2018 4:11 PM (in response to SMITHA TOM)Hello Smitha
Do you have a sample workbook to share? The calculation in the absence of any other data is difficult to assist further with.
Packaged workbooks: when, why, how
Thanks
Patrick

2. Re: QQ Plot Formula
Tyler Martin Sep 26, 2018 4:37 PM (in response to SMITHA TOM)Hi Smitha,
This formula appears in another forum post. I'm not totally sure of how they derived it, but my guess would be that it is the first few terms of the power series solution to the differential equation that defines the normal quantile function.
See my reply to that post for an alternative formula that uses a rational approximation.
I hope that helps!
Tyler