[AccessD] z score to percentile calculator

Oops, try this:

Simplest way is to set a reference to Excel and then use the NormSDist() 
function:
 
 Function NormSDist(ZScore As Double) As Double
 Dim xlapp  As New Excel.Application
 NormSDist = xlapp.NormSDist(ZScore)
 xlapp.Quit
 Set xlapp = Nothing
 End Function
-- 
 Stuart