Question 1193388
<pre>
Here is a data set whose mean is 8:

{4,7,9,12}  [That's because 4+7+9+12 = 32 and 32/4 = 8]

Now subtract 2 from each of the numbers in that
data set.  Then average them and see what the
new mean is.  Compare that to the original mean 8.  
Then you will be able to choose the correct answer.

Edwin</pre>