Amazon review dataset

1. Average ratings by time of year, linear regression etc.

https://github.com/mlepage/HackReduce

(Hack/Reduce Ottawa) Check out what the team did here: http://www.hackreduce.org/2011/08/shopping-and-dating-hacks-ottawa/

Team-RIM was voted as winner by the participants. For the amazon review data, team-RIM calculated the average rating given on specific dates calculated over all of the years in the dataset. You can see that all products are almost given a rating of 4. You can also notice that right after christmas the ratings drop off, ie. people give worse review right after christmas. They also calculated a linear regression from which they could draw the conclusion that ratings become worse the longer time the product has been on the site.

It's "Team-RIM".