XBar chart
properties | Configuring an XBar chart |
XBar chart
calculations

The Xbar chart shows how the mean (or average) changes over
time. This chart is used to analyze central location; that is, the
center of a set of sample data. The statistic used to describe the
central location is the mean.

Data for the Xbar chart can be derived from subgroups of
constant size or variable sizes.

In the following XBar chart example, the subgroup size for the
sample data is 5 (the default size). The mean (average) of each
subgroup is plotted on the chart. The control limits (shown on the
chart as UCL, CL, LCL, WL1, and WL2) are set according to the data
and a sigma limit of 3.

### See Also