What are the different measures of dispersion?

A measure of statistical dispersion is a real number that is zero if all the data are identical, and increases as the data become more diverse. It cannot be less than zero./ 

Most measures of dispersion have the same scale as the quantity being measured. In other words, if the measurements have units, such as metres or seconds, the measure of dispersion has the same units. 

Such measures of dispersion include: 

1. Standard deviation 

2.Interquartile range or Interdecile range 

3.Range 

4.Mean difference 

5.Median absolute deviation 

6.Average absolute deviation (or simply called average deviation) 

7.Distance standard deviation.