Amazon calculates a product’s star ratings using a machine learned model instead of a raw data average. The machine learned model takes into account factors including: the age of a review, helpfulness votes by customers and whether the reviews are from verified purchases.
Author M A Thomas has inspired me to look back on my own teenage life and want to write my own diaries. She has put into words the things that teenagers experience and yet not a lot of people talk about. I hope that the people that read this know that if at anytime they need to talk to someone, that they should. Good reading, highly recommend.