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.
If you had no other There Was An Old Lady experience, this would be pretty clever. As rewrites go, it's pretty good, related to Easter, which was my reason for buying it, to read to my grandkids via computer link. It worked pretty well, and they enjoyed the story.