Step 1: Find the mean
(80+75+25+62+68)/5
310/5
62
Step 2: Find the distance of each number from value
-----------------
| 80 | 18 |
| 75 | 13 |
|+ 25 | 37 |
| 62 | 0 |
| 68 | 6 |
-----------------
Step 3: find the mean of the distances
18+13+37+0+6/5
14.8