A description of a distribution almost always includes a measure of its
center or average. The two common measures of center are the mean
and the median.
Click below the line to add an observation.
The red arrow marks the median. The green
arrow marks the mean. When the median and mean
are equal a single yellow arrow is shown.
You can use the mouse to drag a point along the
line. Drag a point to the trash to remove it. Click
on the trash to remove all points.