In Excel 2007 I am using a double bar graph (like a regular bar graph, but with two columns under one x-axis value) as my chart. I have 8 x-axis values, making a total of 16 actual bars.

I need to add a different value of standard deviation for each bar (meaning 16 different values of standard deviation).

- How can I do this?
- How do I add the standard deviation for each bar if each standard deviation is different / unique for each bar?