differentiate between absolute measure and relative measure of dispersion.

The answer to your question is already covered in our study material. Follow the given link and scroll down to the topic 'Types of measures of dispersion' to view the same.

https://www.meritnation.com/cbse/class11-commerce/studymaterial/economics/statistics-for-economics/measures-of-dispersion/443_2498_6434#slide1_Dispersion and Types of Dispersion