5. Find the mean deviation about the mean.
5 | 7 | 35 | 9 | 63 |
10 | 4 | 40 | 4 | 16 |
15 | 6 | 90 | 1 | 6 |
20 | 3 | 60 | 6 | 18 |
25 | 5 | 125 | 11 | 55 |
= 25 |
= 350 |
=158 |
Now, we calculate the absolute values of the deviations from mean, and
= 158
Hence, the mean deviation about the mean is 6.32