Change the values of any of the 9 blue data points by moving them horizontally with the mouse or by changing the numerical coordinates in spreadsheet column [b]A[/b] to the right. Select checkboxes and observe how the [color=#cc0000][b]Mean[/b][/color], [color=#674ea7][b]Median[/b][/color], and [color=#38761d][b]BoxPlot[/b][/color] of the data set vary as an individual point is moved.[br][br]Select [b][color=#674ea7]MAD[/color][/b] or [b][color=#cc0000]Variance[/color][/b] to move a slider giving an estimate of the "center" [b]M[/b] as the spread is shown. When trace is also selected it is possible to recognize which values of [b]M[/b] minimize [b][color=#674ea7]MAD[/color][/b] or [b]Variance[/b]. You can also select [b]animate[/b] to slowly vary [b]M[/b].