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.
This kind of knowledge should be given in school and colg also, this book differentiate why rich become richer and middle class and poor become pooer so that everyperson can make decision easily, I advice every one must be read this book
I like this product because in this we have learn about money. How we learn to take wark through money and many more. It is big book so I am not able to type so we are purchase it and you know that it is a better book for everyperson.