A good choice for the number of class groups to use in constructing frequency distribution is to have at least 5 but no more than 15 class groups.

Question

Quizplus · Accepted Answer

Having too few class groups can result in loss of information while having too many can lead to confusion and difficulty interpreting the data. Therefore, a good choice is usually to have at least 5 but no more than 15 class groups.

A Good Choice for the Number of Class Groups to Use