Specific data such as age, income, family size, and accupation used for marketing purposes, is called

Demographics.

Explanation:

Specific Data such as age, income, family size, occupation, etc that is used for marketing purposes is called as Demographics.

When Marketing Research is planned, the target audience is defined from which the company needs the feedback. When a company go for a research from a group of people with specific data of their age, income, family size, occupation, disabilities, etc, this is called Research on the basis of Demographics.

it is called market research