2.2 Homework

What is the difference between class limits and class​ boundaries?

Class limits are the least and greatest numbers that can belong to the class. Class boundaries are the numbers that separate classes without forming gaps between them. For integer data, the corresponding class limits and class boundaries differ by 0.5.

Why should the number of classes in a frequency distribution be between 5 and​ 20?

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

What are some benefits of representing data sets using frequency​ distributions? What are some benefits of using graphs of frequency​ distributions?

Organizing the data into a frequency distribution can make patterns within the data more evident. It can be easier to identify patterns of a data set by looking at a graph of the frequency distribution.