Raw data is as highly disorganised as the Kabadiwallah's junk, which is quite large and also very cumbersome to handle. It cannot be used as it is. It calls for a proper organisation and presentation before it can be used for further statistical analysis. Thus, after the data has been collected it has to be organised and thereby presented in a classified form.
For example Kabadiwallah's junk comprises of old newspapers, magazines, empty glass bottles, plastics etc.
So, after collecting it from households, he segragates or classifies them itemwise. This way he makes his trade easy, as junk is classified itemwise and in an organised way.