Hi All,
I already posted this in the Worksheet Functions thread but I'm not sure if
that was the right place?

Anyway here is my question......
Why is
1-NORMSDIST(7.8) = 3.10862e-15
while
1-NORMSDIST(7.9) = 0

Is there a limit to how far out the Gaussian PDF curve you can go before
Excel rounds to zero?

Thanks

Barry