Learn how to show error bars in 2-D area, bar, column, line, xy (scatter), and bubble charts to see margins of error and standard deviations. Choose from predefined or custom error bar options, and change the direction, end style, or value of the error bars. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.