cUSTOM error Bars in Excel 2007

R

RM2007

I can add error bars to my chart by going to the layout option but there does
not seem to be a way to add custom error bars. when I click on custom error
bars it only allows me to add in one value for the entire data series. Does
anyone know how I can add the standard error of the mean for each point on
the graph.

Thanks in advance
 
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