Returns the cumulative distribution function for the specified mean and standard deviation.
The result of normdistcdf is the integral of the NORMDIST function from negative infinity to x. It can also be represented by:
DPlot's NORMDISTCDF function is equivalent to Excel's NORMDIST with the cumulative parameter set to TRUE.
Windows 7, 2008,
Vista, XP, NT,
ME, 2003, 2000,
Windows 98, 95