What are the properties of good measure of dispersion?

Since measures of dispersion are usually called as averages of the second order, they should possess all the qualities of a good average. 

According to Yule and Kendall, they are as follows:

1) It should be easy to calculate and simple to follow./ 

2) It should be rigidly defined: For the same data, all the methods should produce the same result./ 

3) It should be based on all the items so as to be more representative./ 

4) It should be amenable to further algebraic treatment./ 

5) It should have sampling stability./ 

6) It should not be unduly affected by the extreme items.