Amazon calculates a product’s star ratings based on a machine learned model instead of a raw data average. The model takes into account factors including the age of a rating, whether the ratings are from verified purchasers, and factors that establish reviewer trustworthiness.
Reviewed in the United States on September 15, 2007
This is a good book to read, if you plan to get into the customer service field, and work with customers on the phone. The book teaches you techniques that can help you solve problems, control your anger, calm the customer down, and a host of things; but you will have to buy the book to learn more.