The Socio-economic class scale:
A- Top management, bankers, lawyers, doctors and highly salaried professionals
B- Middle management, teachers, graphic designers etc.
C1- Office supervisors, Junior managers, nurses, specialist clerical staff
C2- Skilled workers, trade persons
D- Semi-skilled and unskilled manual workers
E- Unemployed, students, pensioners, casual workers
Demographics and Psychographics:
- Demographic information is used to classify an audience into age, gender, race/nationality, and socioeconomic class Age, Gender, Race/Nationality, Socioeconomic class (A-E) and other categories.
- Psychographic segmentation divides the market into groups depending on a persons interests, hobbies, lifestyle, personality and their job.
District 9
District 9 is a sci-fi/action thriller. This means that it has a wide audience because of it's hybrid genres. It will have a wider audience because more people will be interested in it due to there being more genres included in it. District 9 is about an extraterrestrial race who are forced to live in a slum-like setting by the human race. They are then helped by a member of the government.

The age certificate for District 9 is 15. The film is well fitted to this age range because of the fiction genres and the story line isn't that complex. This film may also interest those who like gaming, which stereotypically, a lot of teenagers aged 15 and above enjoy. This is because it's a very fictional film. On the socio-economical scale, this film would be rated at an E because young teenagers will still be students or maybe have a part time job.
They are not yet fully educated and so may enjoy the fictional story line. I would stereotypically expect men to be more interested in this film because of the action and weapons. It's mostly males who prefer gaming as well and so this is why they would be more likely to watch a film of this genre and style.