Today's AI Artificial Intelligence: It's Not As Difficult As Its Sounds! eBook: Maurice BigMo Flynn, Chris Flynn, Killian Flynn: Amazon.co.uk: Kindle Store

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.