The study of collection, organisation, analysis, and interpretation of data is known as:

The study of collection, organisation, analysis, and interpretation of data is known as statistics.

A glance at other options:

• Datum is a singular form of data. It is a piece of information.
• Demographic analysis is the study of a population based on factors such as age, race, and sex.
• Anthropology is researching human beings, especially their origin, development, customs and beliefs.