I am interested in knowing how to calculate a ranking score from ratings of a product. E.g., take the apple appstore. There are two products A and B. Both have same average rating but 100 reviewers have rated A whereas 1000 reviewers have rated B. Intuitively it seems B should be ranked higher than A (it has lower standard error in the mean). Is there an established formula to compare two items and determine which is better based on their ratings? Continue reading...
