Attributes in Grey Lotus have a varying range, but normal Human range is roughly from 0 to 5, with 2 being average. These are used to derive abilities, and very rarely called upon for their own value.
Each Attribute is part of a pair in an Attribute Group, representing a more abstract view of the abilities of the character. These Groups have their own rating, which is an average of the two Attributes that belong to it. This rating is used for some Skills, and when deriving certain abilities.