Manipulando 80 milhões de reviews de produtos na Amazon usando Apache Spark

Diretamente do blog do Max Woolf.

Digital Music/CD products receive the highest reviews on average, while Video Games and Cell Phones receive the lowest reviews on average, with a 0.77 rating range between them. This does make some intuitive sense; Digital Music and CDs are types of products where you know exactly what you are getting with no chance of a random product defect, while Cell Phones and Accessories can have variable quality from shady third-party sellers (Video Games in particular are also prone to irrational review bombing over minor grievances).