Which of the following statement is incorrect in the context of organisation of data?

Class limits should be indefinite and clearly stated.

The correct answer is option 1: Class limits should be indefinite and clearly stated.

Class limits should be definite (not indefinite) and clearly stated. Generally, open-ended classes such as “70 and over” or “less than 10” are not desirable. The lower and upper class limits should be determined in such a manner that frequencies of each class tend to concentrate in the middle of the class intervals.

In the case of discrete variables, both exclusive and inclusive class intervals can be used. In the case of continuous variables, inclusive class intervals are used very often.