Question 554899
<pre>
The absolute mean deviation is the average difference in absolute
value from the mean

   x     x-<font face = "symbol">m</font>   |x-<font face = "symbol">m</font>|
   2     -2      2 
   2     -2      2
   3     -1      1
   4      0      0
   4      0      0
   5      1      1 
   6      2      2
   6      2      2
----          ----
8)32          8)10 
<font face = "symbol">m</font> =4        AMD= 1.25

The standard deviation is <font face = "symbol">s</font> = 1.5

Edwin</pre>