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.
I was unpleasantly surprised when the package came and I opened it to find it only was the fitted sheet no pillow cases no top sheet !!! I guess I should have read the description better but I definitely would not have purchased this if I realized it was only the fitted sheet:(