Recall that an ogive is a graph that displays cumulative frequencies, where the cumulative frequency for a class is the sum of the frequencies for that class and all the previous classes. We will use the class boundaries and the corresponding cumulative frequencies to create an ogive. Class Limits Class Boundaries Cumulative Frequency 28-38 27.5-38.5 5 39-49 38.5-49.5 30 50-60 49.5-60.5 47 61-71 60.5-71.5 72-82 71.5-82.5 49 50 For the ogive, we use the cumulative frequency on the vertical axis. There are five classes in the table, so