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.
The merit of the book is that it gives a rigorous and precise overview of the concepts underlying jitter and phase noise, which concern almost every electronic system. Such a book was badly needed for this matter is often not well defined and scattered in specialized papers. This turns the book in a basic reference. The availability of MatLab codes moreover gives readers the possibility to experiment, hence understand more deeply the phenomenon.