Error Charts are often considered as an addition to the main series, which can be one of the following types: Area, Bar, Column, Line, Marker, etc. Usually Errors demonstrate the measurement error or uncertainty for the data points – each error bar describes an error or measurement uncertainty. Error Charts are able to be multi-series.
This sample demonstrates using Error bars in a Line Chart. This Chart shows the duration of working on the project. Each point shows how many man-hours were spent on the project in a month. Each point on a Line Chart has a vertical line segment that shows the “error” of the measurement, or, precisely, the dispersion of the values. When you hover any point, a tooltip pops up and demonstrates the value and the extreme values of dispersion. Month are categories distributed along the horizontal x-axis, and the y-axis holds the values in man-hours (in the range from 0 to 350).