Slightly different methods are used for determining the "middle" of a class with limit grouping and cutpoint grouping. identify the methods and the corresponding terminologies. with limit grouping, the "middle" of a class is the average of the two cutpoints of the class; it is called the with cutpoint grouping, the "middle" of a class is the median average of the two class limits cutpoints of the class; it is called the class width. class mark. class midpoint.