I have the percentages for a bell curve; I just want to plug in the percentages with a professional-looking bell curve model. I am a graduate student assisting a professor with his Power Point lectures and I am having a difficult time making a bell curve that would look professional.
http://support.microsoft.com/kb/213930/nl How to Create a Bell Curve Chart
Have a look at this site http://www.mrexcel.com/forum/showthread.php?t=68925
And this one too :