Numbers 09 error bar size

I'm new to numbers and am trying to customise error bars on my graphs.
Is it possible to create error bars of different sizes within a graph? I am using the "standard error" setting but all of the error bars are the same size regardless of sample size.
Can I select each stack in the graph and create an error bar based on its standard error?
Thanks in advance

For custom error bars, you can choose "custom" and select the error data from your table.

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    Message was edited by: Waveman

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