Requisites of Good Measure of Dispersion8th April 2021
A measure of dispersion indicates the scattering of data. It explains the disparity of data from one another, delivering a precise view of their distribution. The measure of dispersion displays and gives us an idea about the variation and the central value of an individual item.
In other words, dispersion is the extent to which values in a distribution differ from the average of the distribution. It gives us an idea about the extent to which individual items vary from one another, and from the central value.
- It should be rigidly defined.
- It should not be unduly affected by extreme items
- It should be based on all the observations.
- It should be amicable to further algebraic treatment.
- It should be lest affected by fluctuations of sampling.
- It should be simple to understand and easy to calculate.