Finally, let's take a look at filters that leverage user demographic information. The basic intuition behind these filter is that users of the same demographic tend to have similar tastes. Therefore, their effectiveness depends on the assumption that women, or teenagers, or people from the same area will share the same taste in movies.
Unlike the previous models, these filters do not take into account the ratings given by all users to a particular movie. Instead, they only look at those users that fit a certain demographic.
Let's now build a gender demographic filter. All this filter does is identify the gender of a user, compute the (weighted) mean rating of a movie by that particular gender, and return that as the predicted ...
