You could use (Y) error bars and specify in which cells Excel can find them.

Rightclick the series and choose Format data series...

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Wigi
http://www.wimgielis.be = Excel/VBA, soccer and music


"patiencescientist" wrote:

how do I plot multiple standard deviation on a control chart?
Frist I am to find standard deviation and plot it I guess the range is 3x
the standard deviaton (using Excel 2003)