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Amazone use machine learning models to calculate rating of products . we can use simple average algorithms like this | |
(5* Number of 5star + 4 * Num of 4star + 3 * Num of 3star + 2 * Num of 2star + 1 * Num of 1star) / ( total number of ratings ) | |
eg : | |
total number of ratings : 3790 | |
5 star rating : 2373 | |
4 star rating : 651 | |
3 star rating : 268 | |
2 star rating : 77 |