Assignment Week 3-3A Approach

Approach

I will use the movie-rating survey collected in Week 2 to implement a Global Baseline Estimate recommendation system in R. I will calculate the overall mean rating, each user’s average rating, and each movie’s average rating, then use these values to estimate ratings for movies that users have not rated. I will recommend the unrated movie with the highest estimated rating for each user.

Anticipated Challenge

The main data challenge is the missing ratings (NA). I will exclude missing values when calculating averages and note that U05 has no ratings, so a user-specific estimate cannot be calculated for that user.