1. A method for evaluating the fit of raw data to model data, the method comprising: receiving a plurality of associations, wherein each association pertains to a relationship between one of a plurality of assessment items for an assessment examination and one of a plurality of attributes; receiving a plurality of responses, wherein each response pertains to an answer by one of a plurality of examinees to one of the plurality of assessment items; receiving a plurality of mastery estimates, wherein each mastery estimate represents whether one of the plurality of examinees has mastered one of the plurality of attributes; determining whether an examinee falls into at least one of a plurality of examinee classes for an assessment item based upon the mastery estimates for the examinee and the associations for the assessment item; generating one or more statistics, wherein each statistic is based on one or more of the associations, responses and mastery estimates; and outputting at least one of the one or more statistics.