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 analyzes reviews to verify trustworthiness.
I like the Delmar test books. Although this particular book has several issues with wording on the questions making it unclear. I also found several wrong answer sheet results. Giving me an incorrect assessment on my knowledge. But over all this is a good book. Besides those minor issues.