Cumulative Normal Distribution

[peacecalc]

Hello Jib,

when I was young (@eric burdon) I learned, that this could only numerical solved. And if my memory is correct working, the error-function slows down very fast to zero. So when numerically integrating such a function and your upper limit is very big, the numerical integration told you: zero, because almost of the function values are zero and the distances are too big between two discrete position where a function value is calculated. So the numerical algorithm gets "blind" for such a small area different from zero.

Short story:
Try as a upper limit 10 and you get what you want.

Kind regards,
peacecalc