Someone is telling you how to calculate the SD of the list 1, 2, 3, 4, 5:

The average is 3, so the deviations from average are

-2 -1 0 1 2 Drop the signs. The average deviation is

$$ \frac{2+1+0+1+2}{5}=1.2 $$

And that's the SD.

Is this right? Answer yes or no, and explain briefly. p-968