Draw a relative frequency histogram for the frequency distribution in Example 2.

Data from Example 2

Using the frequency distribution constructed in Example 1, find the midpoint, relative frequency, and cumulative frequency of each class. Describe any patterns.

Data from Example 1

The data set lists the out-of-pocket prescription medicine expenses (in dollars) for 30 U.S. adults in a recent year. Construct a frequency distribution that has seven classes.