Who would be the audience for your media product?

The audience for our horror film would be late teenagers to young twenties, this is due to this being the general audience for horror movies. However, our secondary audience would be teenagers above the age of 15 due to the film being given a 15 certificate, also with the target audience being such a small range, this does not mean that other ages cannot watch the film and the actual viewing statistics of the audience may show that out target audience was not met and we should have given a different target audience.