Hi Mike,

How can I draw two standard errow control band in excel?
Could you purpose a way?  

Davis, Winsteps uses Excel to do this in "Plots", "Scatterplot".
1. Plot the 95% confidence points matching each plotted point
2. Tell Excel to draw a smooth curve through the 95% confidence points
This is done in the Worksheet and Plot produced by Winsteps (or Ministep). The worksheet is shown at the bottom of http://www.winsteps.com/winman/index.htm?comparestatistics.htm