The 4 functions to do with normal distribution
The 4 functions to do with normal distribution: PDF, CDF, complementary CDF, and QF (ReM p.56). They are ported from WP34S.
Note: we should not forget to set register J (= σ) since it is out of the domain if σ = 0.
Edit: Added "the" to the title.
Edited by MihailJP