Question

why should the number of classes in a frequency distribution be between 5 and 20?
choose the correct answer below.
a. if the number of classes in a frequency distribution is not between 5 and 20, it may be difficult to detect any patterns.
b. the number of classes in a frequency distribution should be between 5 and 20 so that the class width is between 5 and 20.
c. the number of classes in a frequency distribution should be between 5 and 20 so that the class width is not too small.
d. the number of classes in a frequency distribution should be between 5 and 20 so that the class width is not too large.
e. the number of classes in a frequency distribution should be between 5 and 20 so that the classes do not overlap.

Explanation:

The purpose of a frequency - distribution is to show patterns in data. If there are too few or too many classes, it becomes hard to identify trends and patterns in the data.

Answer:

A. If the number of classes in a frequency distribution is not between 5 and 20, it may be difficult to detect any patterns.