Bell curve lines

[Eric]

How can I get the error line to form the 2 and 3 standardiviation points.
Also, how can I plot the 300 points

 

[Andy Pope]

Hi,

Maybe these will help,
http://www.exceluser.com/explore/statsnormal.htm
http://tushar-mehta.com/excel/charts/normal_distribution/index.htm

Cheers
Andy