Help Casey Find the Mean

You will need paper and pencil.  
First, add all the numbers in the set.  Then, count how many numbers are in the set.
Last, divide the sum by the number in the set.  
Type the mean in the box.  Then, click Check Me.

 

 8  0  2  6  2  0  3     

The mean is 

  .
100  300  200  200  100  300  

The mean is 

  .
4   10   8   1   20   5     

The mean is 

  .
11   13   7   9      

The mean is 

  .
2   2   2   2   2   2      

The mean is 

  .

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