(15C)(DM15) - PDF/CDF and Inverse of a Normal Distribution

[John Keith]

(11-28-2021 11:44 AM)deetee Wrote:  Despite there are many efforts from 1946 (Polya) to 2016 (Eidous and Al-Salman) it seems that no one has really solved this problem (simple formula, simple parameters, high accuracy) ...

Perhaps not, but numerical integration is plenty fast on modern hardware, if not on the 15C. I believe that the distribution functions on the 48 series and the Prime use numerical integration.