
Inclusive and Exclusive Class IntervalsInclusive Class Interval:When the lower and the upper class limit is included, then it is an inclusive class interval. For example  220  234, 235  249 ..... etc. are inclusive type of class intervals. Usually in the case of discrete variate, inclusive type of class intervals are used. Exclusive Class Interval: When the lower limit is included, but the upper limit is excluded, then it is an exclusive class interval. For example  150  153, 153  156.....etc are exclusive type of class intervals. In the class interval 150  153, 150 is included but 153 is excluded. Usually in the case of continuous variate, exclusive type of class intervals are used. Consider the frequency table shown below Note: While analysing a frequency distribution, if there are inclusive type of class intervals they must be converted into exclusive type. This can be done by extending the class intervals from both the ends. Thus the class intervals 220  234, 235  249, ....... should be converted into exclusive type 219.5  234.5, 234.5  249.5.... etc. After the conversion the frequency table would look like this Directions: On the basis of the given information answer the following questions. Also write at least one example of your own. 