Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
A very good reference book for at least fourth year, Pune university Engineering students of E&TC branch. It covers the subject Electronic Product Design in depth. (2008 course) Must buy if one prefers using reference books.