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Differentiate between inclusive and exclusive methods of classification. |
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Answer» Exclusive method: Under this method. the classes are formed in such a way that the upper class limit of one class will be equal to the lower class limit of the next class. Here the continuity of the data is maintained. This method is most suitable in case of data of a continuous variable. For example, among class intervals 10-20 and 20-30, 20 is included in the next class interval i.e., 20-30 and not in 10-20. Inclusive method: Under this method, upper class limit is included in a class interval. So here, both upper class limit and lower class limit are parts of the class interval. In the above example, if we take the class interval 10-19, the lower limit, 10 and the upper 19 are included in the class interval 10-19. If we consider the class intervals as marks of students, the marks scored by students between 10 and 19 falls in this class interval. If a student secures 20, it falls in the next class interval. |
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