Solution:
Computation of mean deviation about mean:
Class interval | Mid-values | Frequency | |||
---|---|---|---|---|---|
0-5 5-10 10-15 15-20 20-25 | 2.5 7.5 12.5 17.5 22.5 | 3 4 8 10 5 | 7.5 30 100 175 112.5 | 35 | |
Mean deviation about mean
Following are some definitions related to mean deviation:
Mean coefficient of dispersion
Median coefficient of dispersion
Mode coefficient of dispersion